California Code, Fish and Game Code - FGC § 6707

(a) Each lease shall require, in addition to the license fee required by this chapter, a payment by the lessee or any sublessee of not less than the minimum royalty established under Article 2 (commencing with Section 6680), for all kelp harvested from the lease area, and shall provide for an annual advance payment of not less than forty dollars ($40) per square mile per year for the kelp bed leased, to be credited against the amount payable by the lessee, or sublessee, as the case may be, for each ton of kelp harvested during the ensuing year.

(b) The lease shall, in addition, include provisions for forfeiture of the lease if the annual payment is not made in advance.