The Office of Rail and Road may, on the application of the person permitted by an access agreement to use the whole or part of a railway facility or network installation, give directions requiring the parties to the access agreement to make to the agreement—
In subsection (1)(a) above "more extensive use" means—
and if the applicant is permitted to use only part of the railway facility or network installation, includes use for the purpose for which he is permitted to use it, or (in the case of a railway facility) for any other permitted purpose, of any other part of the railway facility or network installation.
In subsection (2) above "permitted purpose", in relation to a railway facility, means a purpose for which directions may be given in relation to the railway facility under section 17 above.
No directions shall be given under this section in relation to a railway facility if and to the extent that—
No directions shall be given under this section in relation to a railway facility or network installation if and to the extent that, as a result of an obligation or duty owed by the facility owner or installation owner which arose before the coming into force of section 17 or 19 above, the consent of some other person is required by him before he may make the amendments.
Nothing in this section authorises the Office of Rail and Road to give directions to any person requiring him to grant a lease of the whole or any part of a railway facility or network installation.
In this section and section 22B below—