Which of the following must not be included in bid specifications?

The inclusion of brand name restrictions in bid specifications can limit competition and may not be necessary for the item being procured. It is generally advised to ensure that bid specifications are written in a manner that allows for the widest participation possible from potential vendors. Specifying a brand name can constrict the bidding process to products that only meet those particular criteria, which may not represent the best value or quality available in the marketplace.

In contrast, geographical requirements, contract timelines, and payment terms can provide necessary parameters for bidders, ensuring they meet the needs and constraints of the purchasing entity. Geographical requirements help determine where bidders can fulfill contracts effectively, timelines ensure that projects are completed in a timely manner, and payment terms delineate how and when payment will be made, providing clarity to both parties involved in the contract. Therefore, the correct response highlights the importance of allowing broader access and competition when constructing bid specifications.