A procurement under this chapter is subject to all requirements and procedures otherwise applicable to the procurement. Except as otherwise provided by law, the provisions of this chapter supplement, but do not replace, other provisions of this title. Small Business Assistance. The head of each participating procurement agency or a designee shall: Assist small businesses in complying with the procedures for submitting bids and proposals on State contracts; and Consistent with the provisions of this title, attempt to simplify procedures, when practicable, to increase the opportunities for small businesses to participate in preference and reserve procurements. Rejection of Bids or Proposals. The procurement officer shall notify a small business of the reason for rejection of its bid or proposal under a small business preference or a small business reserve procurement.