Contracts not to be divided. a. No contract in the aggregate which is single in character or which necessarily or by reason of the quantities required to effectuate the purpose of the contract includes the provision or performance of additional goods or services, shall be divided, so as to bring it or any of the parts thereof under the bid threshold, for the purpose of dispensing with the requirement of public advertising and bidding therefor.
b. In contracting for the provision or performance of any goods or services included in or incidental to the provision or performance of any work which is single in character or inclusive of the provision or performance of additional goods or services, all of the goods or services requisite for the completion of such contract shall be included in one contract.