In charge allowance at Anglicare

I work as a registered nurse in a facility operated by Anglicare. When is the in-charge allowance payable? 

Clause 18.1 in the Anglican Community Services Enterprise Agreement 2017 sets out that a registered nurse who is designated by the employer to be in charge of a residential service will be paid the allowance set out in Schedule B of the Agreement (currently $23.12 per shift in a facility of less than 100 beds and $37.26 per shift for 100 beds or more).

Note that this provision does not apply to nurses employed in a classification higher than a Registered Nurse Level 1.