Should allows for exceptions
COR 15 — County of Riverside, February 2015, Draft General Plan Amendment No. 960, http://planning.rctlma.org/Portals/0/genplan/general_plan_2015/GPA%20960/General%20Plan%20Elements/Ch01_Intro.pdf
For a policy to be useful, it must be clear. However, not all policies are the same; they differ in terms of expected results, commitment of resources, and indication of importance or urgency. Therefore, it is important to simplify the language used in the General Plan and understand the distinctions between the different levels of policy. The following definitions of terms provide guidance in interpreting the policy language of the General Plan:
Ÿ Shall: Policies containing the word “shall” indicate that an action must be taken in all cases. This represents absolute commitment to the policy, and the expectation is that the policy will always be carried out.
Ÿ Should: Policies containing the word “should” indicate that an action will be taken in most cases, but exceptions are acceptable for good reason.