11Where the rent specified in a certificate of fair rent includes a payment in respect of services provided by the landlord or a superior landlord and the amount which in the opinion of the rent officer or rent assessment committee is fairly attributable to the provision of the services is not less than ten per cent, of the amount of the rent then, if the application for the certificate is made in pursuance of section 46(2) of this Act or the applicant so requests the amount so attributable shall be noted in the certificate together with the amount to be entered in the register under paragraph 5 of this Schedule as the amount to be apportioned to the services.