Defendant’s appeal presents the following question:

1. Did the trial court commit prejudicial error in denying defendant’s motion for nonsuit?

The only motion for dismissal made by defendant was at the close of the State’s evidence. By introducing evidence, she waived this motion. G.S. 15-173. In a criminal case, however, on appeal the court reviews the sufficiency of all the evidence to sustain the verdict, notwithstanding defendant failed to move for nonsuit at the conclusion of all the evidence. G.S. 15-173.1. State v. Rigsbee, 285 N.C. 708, 208 S.E. 2d 656 (1974).

*270Defendant contends that the evidence was insufficient for a valid conviction under G.S. 20-28 (a) for driving while her license was suspended because the State failed to prove beyond a reasonable doubt every fact necessary to constitute the crime. She contends that the State must prove a lawful suspension of her license. She argues that there was no showing of her license being lawfully suspended at the time of her arrest because the license was not suspended in accordance with the procedural due process required by the Fourteenth Amendment of the United States Constitution. In particular, she contends that requirements of procedural due process were not met because she had no actual notice of the proposed suspension and of her right to an opportunity to be heard prior to the effective date of the purported suspension and because she, in fact, had no opportunity to be heard prior to the effective date of the purported suspension.

The State contends that procedural due process does not require actual notice and that the constructive notice given in this case was adequate. The State contends that the constructive notice given was sufficient to provide an opportunity for defendant to have a hearing. The State argues that if defendant had properly submitted a change of address form with the Department then defendant would have had notice and an opporunity for a prior hearing if she had requested one. Notice was mailed on 23 September 1974 and would have been complete under G.S. 20-48 upon the expiration of four days. Since suspension was not effective until 3 October 1974, notice would be complete so that she might request and receive a hearing as much as six days before the suspension.

According to stipulation, the established policy of the Department is upon request to grant a preliminary hearing in a discretionary matter such as this and to rescind the order of suspension until such time as the preliminary hearing is conducted. In this regard, it might be noted that there was no evidence that defendant or others in her position were aware of this policy. G.S. 20-16 (d) merely provides that a preliminary hearing shall be held within 20 days of receipt of request. The notice to defendant failed to disclose this policy of the Department when it stated that defendant was not entitled to operate a motor vehicle during the period of suspension pending the hearing.

*271We have previously held that a conviction under G.S. 20-28 (a) requires that the State prove beyond a reasonable doubt (1) the operation of a motor vehicle by a person (2) on a public highway (3) while his operator’s license is suspended or revoked. State v. Cook, 272 N.C. 728, 158 S.E. 2d 820 (1968); State v. Blacknell, 270 N.C. 103, 153 S.E. 2d 884 (1967); N.C.P.I.—Crim. 271.10 (October 1974).

However, we believe that the legislature also intended that there be actual or constructive knowledge of the suspension or revocation in order for there to be a conviction under this statute. We reach this conclusion for the reason that G.S. 20-16(d) requires the Department to provide notice and an opportunity for a hearing in order for there to be a lawful suspension. For purposes of a conviction for driving while license is suspended or revoked, mailing of the notice under G.S. 20-48 raises only a prima facie presumption that defendant received the notice and thereby acquired knowledge of the suspension or revocation. See Willis v. Davis Industries, 280 N.C. 709, 186 S.E. 2d 913 (1972); Mill Co. v. Webb, 164 N.C. 87, 80 S.E. 232 (1913). Thus, defendant is not by this statute denied the right to rebut this presumption.

G.S. 20-7.1, which imposes a duty on licensees to notify the Division of Motor Vehicles within 60 days of each change of address, is not applicable to this case since it did not become effective until 1 July 1975. This statute leaves unchanged the fact that there is no duty imposed on the licensee to notify the Division of Motor Vehicles until 60 days after a move. Thus, because of the rapid mobility of society, this 60 days provision may render it impractical for adequate notice to be given to numerous violators. We conclude that it would be more practical if the time limit for giving notice of a change of address were substantially less.

In determining the question of judgment as of nonsuit, we consider all the evidence in the light most favorable to the State. State v. Hankerson, 288 N.C. 632, 220 S.E. 2d 575 (1975); State v. Cutler, 271 N.C. 379, 156 S.E. 2d 679 (1967). Furthermore, “the defendant’s evidence which explains or makes clear the evidence of the State may be considered” as well as “defendant’s evidence which rebuts the inference of guilt when it is not inconsistent with the State’s evidence.” (Emphasis supplied.) State v. Bruton, 264 N.C. 488, 499, 142 S.E. 2d 169, 176 *272(1965); accord, State v. Blizzard, 280 N.C. 11, 16, 184 S.E. 2d 851, 854 (1971).

“If, when the evidence is so considered, it is sufficient only to raise a suspicion or conjecture as to . . . the commission of the offense . . . , the motion for nonsuit should be allowed.” State v. Cutler, supra at 383, 156 S.E. 2d at 682.

In State v. Carter, 254 N.C. 475, 479, 119 S.E. 2d 461, 464 (1961) we stated:

“And when the State’s evidence and that of the defendant is to the same effect, and tend only to exculpate the defendant, his motion for judgment as of nonsuit should be allowed.” [Citation omitted.]

The State’s evidence as to notice tended to show that the Department mailed one letter to defendant on 23 September 1974 to notify her of the suspension of her operator’s license from 3 October 1974 to 2 December 1974. On 2 October 1974 the letter was returned to the Department, which marked it “Order Unclaimed.” No further attempt was made by the Department to notify defendant of her suspension. On cross-examination the State’s own witness testified that defendant told him she resided at Cedardale Lane in King when he stopped her and that “she did not know her license was suspended and that no one had been in touch with her.”

Defendant’s evidence in explanation of the State’s evidence indicates that she did not live at the address to which the Department mailed the notice. She testified that she had moved twice since holding that address and that she had submitted change of address cards to the Post Office upon both moves. Her first move was within the same city. The fact that the notice was returned unclaimed indicates that pursuant to the regulations of the Post Office it discontinued forwarding defendant’s mail from her first address after her second permanent move within one year. 39 C.F.R. § 158.2 (1974). Also, defendant testified that she had no notice or knowledge of suspension of her license.

Thus, all the evidence indicates that defendant had no notice or knowledge of suspension of her license. The evidence completely rebuts the prima facie presumption that the notice mailed to defendant’s McCreay Street address was actually received. The lack of actual notice and resulting knowledge *273removes the criminal character from defendant’s conduct, and the court should have granted a nonsuit.

State v. Teasley, supra, is distinguishable from the present case because in Teasley defendant offered no evidence to rebut the prima facie presumption that notice was received upon the mailing, whereas here all the evidence rebuts that presumption.

On account of our disposition of the nonsuit issue it is unnecessary to consider defendant’s contention as to the charge of the court.

Reversed.

concurring.

I agree with the Court that the State’s evidence negated defendant’s culpability. I add these additional observations:

General Statute 20-28 (a) does not specify whether one must operate a motor vehicle knowing that his license has been suspended before he commits a violation of the section. Our traditional rule, however, is that when the General Assembly does not specify whether guilty knowledge, or mens rea, is required, the necessity of its existence will nonetheless be implied. State v. Welch, 232 N.C. 77, 59 S.E. 2d 199 (1950); State v. Elliott, 232 N.C. 377, 61 S.E. 2d 93 (1950); State v. Powell, 141 N.C. 780, 53 S.E. 515 (1906); accord, Sweet v. Parsley, [1969] 1 All E.R. 347 (House of Lords); see A. Loewy, Criminal Law in a Nutshell § 7.04B (1975).

The rule was first announced in State v. Powell, supra, where defendant had been convicted of retailing intoxicating liquor. The trial judge refused to admit evidence that defendant honestly and reasonably thought that what he sold was not alcoholic in nature. For this error this Court ordered a new trial holding that such evidence ought to be received and the jury properly instructed upon it. In a lengthy and well-reasoned opinion Justice Connor made these points: (1) General defenses to criminal liability are, as a matter of statutory construction, read into criminal statutes. (2) If the courts did not recognize these defenses then courts and statutes alike should be abated as public nuisances. (3) While ignorance of the law is no defense to a criminal accusation, mistake of fact is a complete *274defense. (4) Punishment of one who acts under an honest and reasonable mistake of fact would serve as no deterrent to crime but would inflict a grievous injustice and would shock the moral sense of the community. (5) This defense has been applied to regulatory offenses as well as more heinous crimes. (6) The objection that the presence of the defense would facilitate evasions of the statute was rejected. (7) The State need’ not initially prove guilty knowledge. The burden is on the defendant to raise the issue of an honest and reasonable mistake of fact. (It is now, of course, uncertain whether Mullaney v. Wilbur, 421 U.S. 684 (1975) would require the State to prove knowledge beyond a reasonable doubt once the issue is properly presented. Compare State v. Hankerson, 288 N.C. 632, 220 S.E. 2d 575 (1975) (self-defense and heat of passion) with State v. Hammonds, 290 N.C. 1, 224 S.E. 2d 595 (1976) (insanity).)

In State v. Welch, supra at 80, 59 S.E. 2d at 202, Justice Ervin said with reference to a claim of mistake of fact, “[i]t is axiomatic at common law that a crime is not committed if the mind of the person doing the act is innocent. The statutes relating to the unlawful transportation of intoxicating liquor are to be construed in the light of this common law principle, and the existence of guilty knowledge on the part of the accused is to be regarded as essential to criminality, even though it is not required by the statutes in express terms.”

In Poultry Co. v. Thomas, 289 N.C. 7, 15, 220 S.E. 2d 536, 542 (1975) we recently said of another traffic violation:

“G.S. 20-150 (c) is a safety statute enacted by the Legislature for the public’s common safety and welfare. The statute does not contain the words ‘knowingly,’ ‘willfully’ or any other words of like import. It was the obvious intent of the Legislature to make the performance of a specific act a criminal violation and to thereby place upon the individual the burden to know whether his conduct is within the statutory prohibition.”

That, however, was a civil case in which the only issue was whether plaintiff could recover from a negligent defendant when plaintiff passed at an intersection within city limits without knowledge or reason to know that he was within city limits. Criminal liability was not in issue. This difference is crucial. The only North Carolina criminal case cited by the majority in Poultry Co. was State v. McLean, 121 N.C. 589, 28 S.E. 140 *275(1897), which really involved ignorance of law rather than mistake of fact. Poultry Co. may be further distinguished in that the offense there considered, even if criminal, was a petty one punishable at most by a fine of $100 and imprisonment in jail for 60 days. N. C. Gen. Stat. 20-176 (b). A violation of General Statute 20-28(a), however, is a general misdemeanor punishable by two years imprisonment, or a fine of not less than $200, or both. We said in Poultry Co., “[w]e would not extend the rationale of this rule [due process does not require guilty knowledge] beyond petty offenses involving light punishment nor'... to any crime involving moral delinquency.” 289 N.C. at 15, 220 S.E. 2d at 542.

There are, of course, well recognized limits to a mistake of fact defense. It is not, for example, generally available to negate an element of a crime which merely aggravates what would otherwise be criminal or immoral conduct. State v. Wade, 224 N.C. 760, 32 S.E. 2d 314 (1944) (rape of a child under 12 — mistake as to age is no defense); Regina v. Prince, 13 Cox Crim. Cas. 138 (Cr. App. 1875) (abduction of girl under age of 16 without father’s consent — mistake as to age is no defense).

While allowing mistake of fact as a defense where the legislature is silent as to the requirement of guilty knowledge is perhaps contrary to the trend of recent authority in other states and England, see cases cited in Poultry Co. v. Thomas, supra at 13-14, 220 S.E. 2d at 541; Regina v. Miller, [1975] 2 All E.R. 974 (Ct. App. Crim. Div.), I believe to do so accords more with the ends of justice and well-reasoned North Carolina decisions to which I have already referred.

Mistake of fact as a defense does not seem to be required by the Federal Constitution. United States v. Balint, 258 U.S. 250 (1922); Cf. United States v. Park, 421 U.S. 658 (1975). Whether strict criminal liability of a substantial nature when expressly mandated by the General Assembly would be viola-tive of the Law of The Land Clause of the North Carolina Constitution, Article 1 § 19, need not now be determined. See Comm. v. Koczwara, 397 Pa. 575, 155 A. 2d 825 (1959), for persuasive authority that such an enactment would be unconstitutional.

Applying the foregoing principles to a prosecution under General Statute 20-28 (a) where the suspension or revocation *276was a discretionary act, I believe that when the State proves beyond a reasonable doubt that defendant was operating a motor vehicle on a public highway while his license was lawfully suspended or revoked, notice of such suspension or revocation having been given pursuant to General Statutes 20-16 and 20-48, nothing else appearing, the jury should be instructed to find the defendant guilty. Guilty knowledge,, in other words, is not a necessary element of the crime to be proved in the state’s case in chief. Neither is receipt of notice necessary in order for the suspension or revocation to be effective or lawful. Defendant’s lack of knowledge of the suspension or revocation is a mistake of fact defense which ordinarily is raised by defendant.

Where, however, as here, the State’s own evidence is that defendant drove honestly and reasonably without knowledge of the suspension or revocation, nonsuit is proper because the State has made out a mistake of fact defense. In a case where only the defendant’s evidence tends to prove an honest and reasonable mistake of fact, the State should not be nonsuited. Rather the issue of mistake of fact should be presented to the jury upon proper instructions. Important on this issue would be the rebuttable presumption that a duly mailed notice of suspension or revocation was duly received. While proof of mailing of the notice and the expiration of four days thereafter is proof of a valid suspension or revocation, N. C. Gen. Stats. 20-16, 20-48, this proof may or may not satisfy a jury, even with the presumption, that defendant actually knew of the suspension if his evidence tends to show he did not.