The only question raised in this action is whether the plaintiff, Petti, has been entitled during the relevant period to occupy the office of city clerk of the city of Brockton.1 The action was brought on January 25,1978, against John J. Lyons, who occupied that office, and the members of the Brockton city council. Petti was elected2 to that office on December 27, 1977, for a three year term until December 26, 1980, by the outgoing city council.3 On January 2, 1978, the new city council elected Lyons to be city clerk. He had been elected to that office initially on November 3, 1971, and reelected on October 29, 1974, for a “term ending December, 1977.” On December 5, 1977, Lyons brought an action in a Probate Court against the then incumbent city councillors seeking to enjoin them from electing a new city clerk. That resulted in an interlocutory order entered December 23, 1977, based on a stipulation between Lyons and the city council that Lyons would continue to exercise the duties of city clerk until the entitlement to the office was resolved. Petti was not a party to that action but indicates in his brief that he acquiesces in this arrangement.4

The plaintiff’s entitlement to the office of city clerk depends on the controlling statutes. Brockton was originally incorporated as a city by St. 1881, c. 192. This city charter provided in § 3 that “the municipal year shall begin on the *560first Monday of January following” the annual election of the city council. On that day the city council is organized (§ 9) and, as provided in § 14, “shall annually, as soon after their organization as may be convenient, elect ... a city clerk [and other officials] . . . who shall hold their offices respectively for the term of one year, and until their successors shall be chosen and qualified.” The pattern thus established for the annual election of a city clerk by the city council upon its organization in January was consistently followed from 1882 through 1901. That year, by St. 1901, c. 332, the term of office of the city clerk was extended to three years in those cities which accepted that statute. As applicable to Brockton, which accepted the statute on December 3, 1901, it provided: “In the year nineteen hundred and two and every third year thereafter . . . there shall be elected or appointed as required by the charters of their respective cities, a city clerk, to hold his office for three years from the day of his election or appointment. . . . Every such clerk shall hold his office until the election or appointment and qualification of his successor, unless sooner removed by due process of law .... When a vacancy shall occur in the office of city clerk the person elected or appointed to fill the vacancy shall hold the office until the end of the unexpired term of the person last holding the office . . . .”5

Under that statute the city clerk’s three-year term thus began with the election by the city council in January of *5611902 upon its organization at the beginning of the municipal year, with a new election three years thereafter to begin another three year term. The pattern thus established by the 1901 statute was followed in Brockton beginning with January of 1902 through January of 1959; the sequence was broken on only two occasions, in 1912 and 1953, when elections were held to fill the terms of clerks who had died.

In accordance with the pattern established by that statute of successive three-year terms beginning in January of 1902, the city council would have been expected to elect a city clerk in January of 1905, and in every third January thereafter until January of 1980,® unless the statutory pattern was vitiated by (a) the adoption of a Plan B charter by the city on November 3, 1957,6 7 or (b) by St. 1961, c. 511, providing tenure for one Melvin Clifford, the then incumbent of the office of city clerk, until he should reach the age of seventy in October, 1968. We think that neither is the case;

(a) We see nothing in the adoption of Plan B (G. L. c. 43, §§ 1-45 and 56-63) which affects the statutory pattern. In this respect the case is very much like Attorney Gen, v. Loomis, 225 Mass. 372 (1916), in which the city of Medford ^accepted the 1901 statute and thereafter, on the first Monday of January, 1904, a revised charter took effect. At that point the city clerk, one Joyce, who had been elected in January, 1902, for a three-year term, was reelected, purportedly for a three-year term beginning in January, 1904, and ending in January, 1907. The court held, however (at 375), that his term ended not in January, 1907, but in “January, 1905, that is, three years from January, 1902”. Therefore, *562when he vacated his office in September, 1914 (after successive elections, the last one in January, 1913), and a new clerk, one Winslow, was elected in December, 1914, to serve out Joyce’s unexpired term, Winslow was entitled to serve not only until January, 1916, but until January, 1917, in accordance with the three-year statutory pattern beginning in 1902. The court held (at 376) that the unexpired term “then existing [in December, 1914] under R. L. c. 26, § 15 [see n.5], was the three-year period from January, 1914, to January, 1917. [Accordingly], [w]hen the form of election was held ... in January, 1916, whereby the defendant [Loomis] claims to hold the office of city clerk, there was no vacancy. Winslow was still holding the office by virtue of his election of December, 1914, for the remainder of a term, which would not expire until January, 1917.”

Also in the case at bar, the adoption of Plan B by the city of Brockton did not vitiate the statutory pattern of the 1901 statute. While G. L. c. 43, § 11, provides that the adoption of a new plan of government “shall supersede the provisions of its charter,” it does not supersede “general and special laws relating thereto” unless they are “inconsistent” with the new plan. We see no such inconsistency between the provisions of Plan B and the 1901 statute (now G. L. c. 41, § 12; see n.5). We therefore read them together. See Attorney Gen. v. Loomis, 225 Mass, at 375. Indeed, G. L. c. 43, § 18(3), explicitly carries forward the pattern previously established. It provides in the first paragraph for a three-year term and in the second paragraph that “[t]he person holding the office of city clerk at the time when any of the plans . . . has been adopted . . . shall continue to hold office for the term for which he was elected.” Further, the provision in the 1881 statute for the organization of the municipal government on the first Monday in January following a municipal election is also found in G. L. c. 43, § 17.

(b) Nor do we see anything which vitiates the statutory pattern in the grant of tenure to Clifford by St. 1961, c. 511, accepted by the city in the election of November, 1961. *563That did indeed obviate the need for any election by the city council in January, 1962, January, 1965, and January, 1968. But we see no inconsistency with the continuation of the statutory pattern begun by the 1901 statute, so that when Clifford reached seventy in October, 1968, there existed an unexpired term until January 1, 1971. Thus, Clifford’s election on November 1, 1968, after, he reached the age of seventy, could not extend, as the city council thought, to October 31, 1971, but terminated in January, 1971, on which date by force of the 1901 statute, the unexpired term ended, and Clifford became a holdover. See Attorney Gen. v. Loomis, 225 Mass, at 376. Our view that the attainment of age seventy by a city clerk with tenure creates a vacancy calling for an election for an unexpired term is supported by G. L. c. 41, § 19E. This statute in a similar context also views “attaining age seventy ... of an incumbent [city clerk] who had been given such tenure” as creating a vacancy like that created by “death, retirement [or] resignation” and provides for the filling of the vacancy “as provided . . . by the applicable provisions of any general or special law in effect at the time such vacancy occurs.” See G. L. c. 41, § 12, last sentence.

Accordingly, when Lyons was elected on November 3, 1971, to succeed Clifford, that election was for the unexpired term until January, 1974. After that day Lyons held over until his election in October, 1974, which could, however, only entitle him to the remainder of the unexpired term until January, 1977. Thereafter, he held over, and there was no bar to Petti’s election on December 27, 1977, to fill the unexpired term which, following the statutory pattern, ran until January, 1980. Thus, as there was no vacancy to fill in January, 1978, Lyons’ election at that time gave him no right to the office.8

*564We, therefore, reverse the judgment and remand the case to the Superior Court to enter judgment declaring that Petti was entitled to the office of city clerk from December 27, 1977, until January, 1980, and thereafter as holdover until the Brockton city council takes (or took) action.

So ordered.