This chapter and all its provisions shall at all times be subject to contrary provisions contained within a contract reached through collective bargaining and upon the adoption of any labor contracts, except that those clauses and terms which are specifically restricted to the nature and quality of the work performed by the employee shall be deemed extended to cover all employees within the municipal service without further action by the Township governing body to enact their provisions. All questions concerning the applicability of the provisions of the labor contract to other employees within the municipal service shall be resolved by the Township Administrator, whose determination shall be deemed final.