Speaking at the conference on Friday, former Welsh assembly Presiding Officer Lord Elis-Thomas told party members that withholding the licence fee "no longer belongs to policy development in a constitutional political party".
The agency has applied to the Welsh Assembly Government and DEFRA for permission to introduce legislation to limit the number of licences to 50 and charge a fee for the permits.
The agency said it had applied to the Welsh Assembly Government and Defra for permission to introduce laws to limit the number of licences to 50 and charge a fee for the permits.