I believe 'divert time' may be referring to the concept of 'latest divert time' whereby you're given a scenario such as:
'You are holding at YAAA due the the weather being below landing minima at time 1300Z, with 70 mins fuel on board. Alternate YBBB is 25 mins flight time away. What is the latest time you can hold at YAAA until you divert to YBBB with reserves intact?
The 60 minute rule you refer to is for NVFR aircraft planning to an aerodrome not served by a navaid. AIP ENR 1.1 58.3.3
Last edited by Nomde plume; 31st Oct 2015 at 22:05.
Reason: AIP ref