California Code, Business and Professions Code - BPC § 8555

(a) Public utilities operating under the regulations of the Public Utilities Commission, except to work performed upon property of the utilities not subject to the jurisdiction of the Public Utilities Commission or work done by the utility for hire.

(b) Persons engaged only in agricultural pest control work under permit or license by the Department of Pesticide Regulation or a county agricultural commissioner.

(c) Pest control performed by persons upon property that they own, lease or rent, except that the persons shall be subject to the limitations imposed by Article 3 of this chapter.

(d) Governmental agencies, state, federal, city, or county officials, and their employees while officially engaged.

(e) Authorized representatives of an educational institution or state or federal agency engaged in research or study of pest control, or engaged in investigation or preparation for expert opinion or testimony.  A professional engaging in research, study, investigation, or preparation for expert opinion or testimony on his or her own behalf shall comply with the requirements of this chapter.

(f) Certified architects and registered civil engineers, acting solely within their professional capacity, except that they shall be subject to the limitations imposed by Article 3 of this chapter.

(g) Persons engaged in the live capture and removal or exclusion of vertebrate pests, bees, or wasps from a structure without the use of pesticides, provided those persons maintain insurance coverage as described in Section 8692. “Vertebrate pests” include, but are not limited to, bats, raccoons, skunks, and squirrels, but do not include mice, rats, or pigeons.  This section does not exempt a person from the provisions of Chapter 1.5 (commencing with Section 2050) of Division 3 of the Fish and Game Code.