California Code, Fish and Game Code - FGC § 3700.1

(b)(1) State duck hunting validations shall be sold for a fee of ten dollars ($10), as adjusted pursuant to Section 713, by the department and by license agents, who are authorized by the department pursuant to Section 1055.1, in the same manner as hunting licenses.

(2) In addition to the fee imposed pursuant to paragraph (1), a fee of ten dollars ($10) is hereby imposed to obtain a state duck hunting validation, as adjusted pursuant to Section 713.