A. Additions and alterations to existing buildings, except for substantial building alterations; and

B. The use of portable propane appliances outside of the building envelope, such as for outdoor cooking and outdoor heating appliances; and

C. Essential services buildings that are electric ready; and

D. Back-up power facilities for essential services buildings; and

E. Development projects that have obtained vested rights prior to the effective date of this chapter pursuant to a preliminary affordable housing project application in accordance with Government Code Section 65589.5(o), a development agreement in accordance with Government Code Section 65866, a vesting tentative map in accordance with Government Code 66998.1, or pursuant to the ruling in Avco Community Developers Inc. v. South Coast Regional Communication (1976) 17 Cal. 3d 785, or pursuant to other applicable statutory or case law.