810 CMR, § 10.10
All prequalified Subcontractors as determined by the Prequalification Committee shall be invited in writing by the Awarding Authority to submit a sub-bid in accordance with the bidding procedures set forth in M.G.L. c. 149, § 44F. The invitation to bid shall be sent to all prequalified Subcontractors via first class mail, postage prepaid, and shall specify therein the deadline for the submission of filed sub-bids from prequalified Subcontractors and indicate where prequalified Subcontractors may obtain copies of the plans and specifications for the particular Building Project. In no event shall the deadline for submission of sub-bids from prequalified Subcontractors be less than 14 days from the issuance of the invitation to bid. Any other parties interested in obtaining plans and specifications for the Building Project may do so by providing a deposit as designated by the Awarding Authority. The Awarding Authority shall only accept sub-bids from prequalified Subcontractors.
810 CMR, § 10.10