(b) any organization claiming to be representative of persons requiring licences in cases of the class to which the order applies; or (c) any person claiming that he requires a licence in a case of that class, may, subject to the provisions of subsection (2), at any time while the order is in force, again refer the scheme to the tribunal in so far as it relates to cases of the class in respect of which the order applies. (2) (3) A licence scheme shall not, except with the special leave of the tribunal, again be referred to the tribunal under subsection (1) (a) where the relevant order was made so as to be in force indefinitely or for a period exceeding fifteen months, before the expiration of a period of twelve months from the date on which the order was made; or (b) where such order was made so as to be in force for a period not exceeding fifteen months, at any time more than three months before the date of expiry of the order. The provisions of section 31 shall mutatis mutandis apply in respect of any reference under this section or any order made thereon, and the tribunal shall have power to make such order on any such reference as it deems just. 33 Applications to tribunal (1) For the purposes of this Chapter a case shall be taken to be covered by a licence scheme if, in accordance with a licence scheme for the time being in operation, licences would be granted in cases of the class to which that case belongs: Provided that where in accordance with the provisions of a licence scheme (a) the licences which would be so granted would be subject to terms and conditions whereby particular matters would be excepted from the licences; and (b) the case in question relates to one or more matters falling within such an exception, that case shall be taken not to be covered by the scheme. (2) Any person who claims that in a case covered by a licence scheme the licensing body operating the scheme has refused or failed to grant him a licence in accordance with the provisions of the scheme or to procure the grant to him of such a licence, may apply to the tribunal for an order under this section. Source: http://www.wipo.int/portal/es/