(b) Subdivision (a) is not applicable if the awarding authority, or its designee, makes a finding that is described in the invitation for bids or request for proposals that a particular material, product, thing, or service is designated by specific brand or trade name for any of the following purposes:

1. (1) In order that a field test or experiment may be made to determine the product’s suitability for future use.
2. (2) In order to match other products in use on a particular public improvement either completed or in the course of completion.
3. (3) In order to obtain a necessary item that is only available from one source.
4. (4) In order to respond to an emergency declared by the state, a state agency, or political subdivision of the state, but only if the facts setting forth the reasons for the finding of the emergency are contained in the public records of the authority issuing the invitation for bid or request for proposals.