The permanent chairman, secretary, treasurer and other officers of the joint meeting, appointed or elected pursuant to the provisions of this article, shall hold their several offices until the final completion of the improvement or works provided for by the joint contract between the several municipalities. The joint meeting shall fix the compensation to be paid to each of said officers and they shall be respectively entitled to receive the same at the rate fixed by the joint meeting during their terms and until the completion of the improvement or works provided for in and by the joint contract.

Upon the completion of such improvement or works, the joint meeting shall reorganize for the maintenance and operation of the completed improvement or works, by the election of a chairman, and a secretary and a treasurer and such other officers, agents and employees as may be needed for such maintenance and operation, and shall fix the compensation of all such officers, agents and employees. The chairman of such reorganized joint meeting shall continue in office until his successor shall be duly elected and qualified, notwithstanding he may have ceased to be a member of the governing body or board of any contracting municipality.

Nothing in this section shall be deemed to require any municipalities which have heretofore jointly contracted for or jointly constructed any joint sewers, sewerage system or disposal plant or works under the authority of an act entitled “An act to authorize any two or more municipalities in this state to jointly provide, maintain and operate trunk or outlet sewers and sewage disposal plant or plants or a system of sewerage and to otherwise act jointly concerning the collection, removal or disposal of sewage and make contracts in relation thereto,” approved April eighth, one thousand nine hundred and ten, to reorganize such joint meeting upon the completion of such improvement or works.