(1) Bidders shall submit sealed bids in writing. Electronic submittal systems and processes may be utilized provided the submittal meets the definition of a sealed bid and the other requirements of this section.

(2) The agency shall ensure that bids remain sealed until the opening date and time specified in the solicitation.

(3) The agency shall open all sealed bids at the same time.

(4) Bidders shall submit bids to the agency no later than the opening date and time, and at the place specified, in the solicitation. An agency shall reject any bid received at a place different than, or on a date and time later than, what was specified in the solicitation.

(5) The agency may modify bid submission dates. When modifying the time allowed for submitting a bid, the agency shall issue an amendment as required by WAC 236-51-310 and provide notice consistent with WAC 236-51-320.