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An officer should know for three months ahead their rest days, and the start and end times of their tour of duty. An exigency is not defined in the police regulations, however the dictionary definition is as good a guide as any and this defines an exigency as 'an urgent or pressing situation'.
The three month roster should be published one month before it is due to commence. If you have received a duty change for a date before the date shown then you have not had due notice and need to be enquiring of your resource unit the reason for the change of duty and consulting your local federation representative. The notification of the change does not include the date changed and the date on which you were notified. It should be 90 clear days. Any change after the date shown will therefore be valid.
These should not be changed except for exigencies of duty. A chief officer shall cause to be published, in accordance with this determination, duty rosters for members of his force of the rank of constable or sergeant (and inspector and chief inspector in the case of part-time members) and, in the determinations made under the Police Regulations 2003: