12. In determining the total time spent in exercising official controls, any time spent by an inspector—
(a)in travelling to or from premises at which he exercises official controls and for which he is paid under a contract of employment or contract for services;
(b)at any premises to which he has gone for the purpose of exercising official controls and for which he is paid under a contract of employment or contract for services (regardless of whether or not he is able to exercise official controls there); and
(c)at any other place—
(i)when he is available for exercising official controls but is not in fact exercising any such controls, and
(ii)for which he is paid under his contract of employment or contract for services,
shall be counted as if it were time when the inspector was exercising official controls.