(a) Interlocal agreements shall be negotiated and shall contain all provisions on which there is mutual agreement between the participating public agencies. Such agreements shall establish a process for amendment, termination and withdrawal. The public agencies proposing an interlocal agreement shall submit to the legislative body of each participating public agency a copy of the proposed interlocal agreement for ratification or rejection. The legislative body of each participating public agency shall provide the opportunity for public comment before voting to ratify or reject such proposed agreement. For purposes of this section, providing the opportunity for public comment does not require a legislative body to conduct a public hearing.

(b) For any municipality in which the legislative body is the town meeting, such legislative body may, by resolution, vote to delegate its authority to ratify or reject a proposed interlocal agreement to the board of selectmen, provided such board of selectmen provides the opportunity for public comment in accordance with this section.