(5) Where the Board rejects an application for the grant of an effluent discharge licence, it shall within twenty-one days notify the applicant of its decision and state in writing its reasons for rejecting the application. (6) An effluent discharge licence issued under this Act shall be in a prescribed form, be subject to such conditions as may be prescribed or as may be specified in the licence and shall remain valid for such period and may be renewed for such further period as may be prescribed or specified in the licence. 61 Cancellation of effluent discharge licence The Board may, in writing, cancel any effluent discharge licence— (a) if the holder of the licence contravenes any provision of this Act; or (b) if the holder fails to comply with any condition specified in the licence; or (c) if the Board considers it in the interest of the environment or in the public interest so to do. 62 Register of effluent discharge licences (1) The Board shall maintain a register of all effluent discharge licences issued under this Act. (2) The register shall be a public document and may be inspected at any reasonable hour at any premises of the Agency by any person on the payment of the prescribed fee. 63 Air quality standards (1) The Standards and Enforcement Committee shall— (a) advise the Board on how to establish criteria and procedure for the measurement of air quality; (b) recommend to the Board— (i) ambient air quality standards; (ii) occupational air quality standards; (iii) emission standards for various sources; (iv) criteria and guidelines for air pollution control for both mobile and stationary sources; (v) any other air quality standards. (c) advise the Board on measures necessary to reduce existing sources of air pollution by requiring the redesign of plants or the installation of new technology or both, to meet the requirements of standards established under this section; (d) recommend to the Board guidelines to minimise emission of greenhouse gases and identify suitable technologies to minimise air pollution; (e) advise the Board on emissions' concentration and nature of pollutants emitted; (f) recommend to the Board the best practicable technology available in controlling pollutants during the emission process; (g) determine for consideration by the Board the analytical methods for monitoring air contaminants and recommend the establishment of such number of laboratories for analytical services as may be needed; 32