(1)  For the purposes of calculating the length of a spell, the spell will be –

(a) taken to commence once all the livestock have been unloaded from the vehicle or the container in which they are being transported; and

(b) taken to end as soon as the livestock commence being reloaded onto the vehicle or into the container.

(2)  For the purposes of calculating the maximum period of time that livestock of a particular species or class of a particular species may have off water, the period off water will be –

(a) taken to commence from the time when the livestock last had reasonable access to water prior to commencing a journey; and

(b) taken to end at whichever of the following opportunities occurs first:

(i) when the livestock are given a spell for at least the minimum period specified in Part 3 for a spell in respect of livestock of that particular species or class of species;

(ii) when the livestock are given reasonable access to water at their final destination;

(iii) when the livestock are slaughtered.