Late to Open

Can a person that has a current lifeguard certification be allowed to watch a group of fellow swimmers until the swim facility calls in another guard? What are the liability issues and it is not really a problem. We did get into the pool about 10-15 minutes late but it is of no issue.

500 swim warm up
6x75 swim50/kick25

Main Set, 4 times
5x100, reverse IM order, 1:45 interval

100 swim
75 swim/25kick
50 swim/50 kick
25 swim/75kick
100 kick
4x50 on 60 sec
To stay close to the interval, I need to modify at times. The last set, butterfly, is appropriate at the end of the main set. I think I dropped 2x50, so I will modify total yards to 4050.

8x50 back on 60 sec

4050 yards