not pearls of wisdom tom i can assure you!
rips - your answer was nearly there you just needed to be aware of the grey book link!
There is one specific example identified with the Sixth Edition of the Scheme of Conditions of Service Section 3 paragraph 7 where a F&RS may not require an employee to carry out a particular activity or in this case a full unit of their role map, yet the employee is still deemed to be competent and therefore attract the competent rate of pay applicable to the role.
quote - ' As with all other units in a role map, a fire and rescue authority can require an employee to carry out driving duties. Where the fire and rescue authority does not require an employee to drive or, for genuine reasons, the employee is unable to drive he or she shall be regarded as competent in the role subject to having demonstrated competence in all other applicable functions in the role map.'
it may be that some fire authorities dont require 'other' parts of specific rolemaps (NOS's) to be undertaken, where the employer makes that decision the employee would not be deemed 'not competent'
i didnt have time to resource the full answer - there was not intent to keep you awake at night because of your inability to sleep due to my inability to provide the correct answer at the appropriate moment
dave bev