Verbs to use after expectations

How about require? From M-W:

require: to call for as suitable or appropriate OR to demand as necessary or essential

Your example:

Policy expectations require the deadline to be extended.

Update: This sentence seems perfectly understandable and reasonable to me. However, if you find expectations require objectionable, you could go with a small edit such as the following, which preservers policy expectations as your desired subject:

Policy expectations dictate that the deadline be extended.

From M-W:

dictate: to require or determine necessarily, e.g., injuries dictated the choice of players, the weather will dictate how long we stay.

Or you could go with something like:

Policy expectations necessitate that the deadline be extended.

Policy expectations call for the deadline to be extended.

Whether you go with require, dictate, necessitate, or call for, it would seem that the policy makers don't have much of a choice: they need to extend the deadline to meet the expectations of those on the receiving end of the policy.