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| Title of Licence /Permit | Purpose | Relevant Link to online information on Licence/Permit | Section/Agency/Body which issues Licence/Permit |
| Occasional Licence | A current holder of an intoxicating liquor licence can move the licence to another premises for a special event | The Courts Service Tel: +353 1 888 6000 Regional Court contacts can be found here | |
| Occasional Trading Permit | To occasionally sell goods at a private place. Private place is defined as a place "where the public do not have access as of right" | Occasional Trading Earlsfort Centre, Email: conspol@dete.gov.ie | |
| Omnibus Station Licence | Authorises an on-licence for the sale of intoxicating liquor in any particular part of the premises | Office of the Revenue Commissioners | |
| Other Registered Premises | Regulation of other registered animal by-product premises | Animal By Products (www.gov.ie) Application form is available through the above link or on request. | Animal By-Products Section, |
| Oyster Dredge | Allows Commercial fishing for Oysters using the dredge method. | Inland Fisheries Ireland |