A person other than a city employee who has prepared specifications used substantially by the city in determining from which bidder or proponent it wishes to purchase goods or services may participate in a bid or proposal procurement in the city where the purchasing agent or city manager determines in his/her reasonable discretion that such participation will be in the best interest of the city in light of the stated purposes of this chapter contained in WPCC 3.25.010. A city employee who has prepared specifications used substantially by the city in determining the bidder or proponent from which it wishes to purchase goods or services may participate as a bidder or proponent in a bid or proposal procurement by the city when the purchasing agent or city manager determines in his/her reasonable discretion that doing so is fair and in the best interest of the city in light of the purposes of this chapter. [Ord. 06-18-2013A § 2].