Idaho Admin. Code r. 38.05.01.052
A formal solicitation may be changed by the buyer through issuance of an amendment, provided the change is issued in writing prior to the formal solicitation closing date and is made available to all vendors receiving the original formal solicitation. Any material information given or provided to a prospective vendor with regard to a formal solicitation shall be made available in writing by the buyer to all vendors receiving the original formal solicitation. Oral interpretations of specifications or contract terms and conditions shall not be binding on the state unless confirmed in writing by the buyer prior to the date of the closing. Changes to the formal solicitation shall be identified as such and shall require that the vendor acknowledge receipt of all amendments issued. The right is reserved to waive any informality.
Idaho Admin. Code r. 38.05.01.052