Any municipality may:
1. apply to and contract with the commissioner for state aid pursuant
to this article;
2. enter into contracts for consulting, engineering and other
professional services for the preparation of documents in respect to
which state aid is to be sought pursuant to this title; provided,
however, the contract costs negotiated between the person or firm chosen
to perform such services and the applicant for state aid under this
title shall be subject to the approval of the commissioner; and
3. expend money received from the state pursuant to this title only
for purposes consistent therewith.