(a) Any contract for the construction of facilities by any authority, when the expenditure required exceeds the sum of $25,000, shall be based solely on competitive sealed bids.
(b) Except as provided in subsections (c) or (d) of this section, the procurement of all supplies, equipment and materials, where the expenditure required exceeds the sum of $25,000, shall be based on the competitive procedure that is best suited under the circumstances of the procurement.
(c) In determining the competitive bid procedure that is best suited under the circumstances, an authority shall conduct:
(1) Competitive sealed bidding if: