578. Payment and extent of charge.

578.     Payment and extent of charge.

In the case of a charge in favour of the landlord1, where he is not the absolute owner for his own benefit, no instalment or interest may be made payable after the time when the improvement will, in the opinion of the Secretary of State or the Welsh Ministers2, have become exhausted3. A charge for the repayment of compensation paid by him to the tenant4, or for the cost of improvements which he has the right to carry out in place of the tenant5