Cal. Pen. Code § 2060
For the purposes of Sections 11009 and 11030 of the Government Code, the following constitute, among other proper purposes, state business for officers and employees of the department for which such officers and employees shall be allowed actual and necessary traveling expenses when the state travel and expense have been approved by the Governor and the Director of Finance as provided in that section.
Attending meetings of any national association or organization, having as its principal purpose the study of matters relating to penology, including prison management and paroles, or to a particular field thereof, conferring with officers or employees of the United States relative to problems relating to penology, including prison management and paroles, in California, conferring with officers or employees of other states engaged in the performance of similar duties, and obtaining information useful to the department in the conduct of its work.
Ca. Pen. Code § 2060