59.—(1) A mine which has been opened on a date before the commencement of this Act (not being a date that falls more than 7 years before such commencement) shall not be rateable until the year after the year in which the mine shall have been opened for 7 years.

(2) An abandoned mine which has been reopened on a date before the commencement of this Act (not being a date that falls more than 7 years before such commencement) shall not be rateable until the year after the year in which the mine shall have been reopened for 7 years.

(3) A right to drill for and take away petroleum in respect of a particular oil pool, being a pool from which oil was first produced on a date before the commencement of this Act (“the date of first production”), not being a date that falls more than 20 years before such commencement, shall not be rateable until the 20th year from the date of first production.

(4) An apartment—

(a) which ceases to be used as part of an apart-hotel for a period of 12 months or less, and

(b) which, but for this subsection, would not be rateable during that period by reason of its being a domestic premises,

shall be rateable during that period, unless otherwise exempted from being rateable by virtue of this Act.