I say treat it the same way the commercial fishermen do it.
They are only allowed so many licenses. New operators cannot legally get in until existent operators choose to get out. Commercial licenses have take limits. They have seasons. They may have geographic limits. They have other limits such as sex and size.
Individual licenses may have different and varying quotas and other allowances, therefore differing monetary values. Licenses may be bought and sold between operators. Fish and game authorities would monitor take and periodically revise limits as determined by peer and stakeholder data review.
jsc
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"As hard as I've tried, just can't NOT do this"
John Crickmer

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