California Code, Public Resources Code - PRC § 778

(a) Has been convicted of a felony substantially related to the qualifications, functions, or duties of a registered professional forester.  A conviction within the meaning of this section means a plea or verdict of guilty or a conviction following a plea of nolo contendere.  Any action that the board is permitted to take following the establishment of a conviction may be taken when the time for appeal has elapsed or when an order granting probation is made suspending the imposition of sentence, irrespective of a subsequent order under Section 1203.4 of the Penal Code.

(b) Has been found guilty by the board of any deceit, misrepresentation, fraud, material misstatement of fact, incompetence, or gross negligence in their practice.

(c) Has been guilty of fraud or deceit in obtaining their registration or certification.

(d) Aids or abets a person in the violation of this article.

(e) Fails in any material respect to comply with this article.