One thing no one seemed to clarify in regard to what you're entitled to. If they call you in at 13th hour for 15th, when you arrive, if load is not ready, you punch for your arrival. You are now running 3 clocks, 2 of which you're entitled to pay for. The first is actual time spent obviously.
The second depends on how long you wait for your load. If you wait beyond your 16th hour, you the forget the 2 hr 12-14 guarantee and take 14th hour plus as your pay. IE 16.5 hrs til load ready is 2.5 hours layover plus 1.5 hours clock time. If your load is ready before 16th hour, you forget 14th hour on and take your 12 - 14 2 hour guarantee, which is more, along w/the actual clock time.
Some terminals will try to play you, when a load is delayed for multiple reasons. Say you inccur delay waiting on the actual loading, hook or paperwork. This clock time is paid through dispatch. Some terminals will tell you you're ready, give you you're bills and sign your sheet after you punch, you think your done and don't get your layover pay because you didn't make the 14th hour. You walk out of dispatch, down the steps and discover your unit and load is in the shop being repaired. If you go back to dispatch, they tell you to punch in at the shop, they are not responsible, the shop is. The shop is really obligated for your actual time from your upstairs punch out, until they tell you your ready and you hit their clock. You then can go back to dispatch, to get them to sign for you being over 14th hour.
However, if you punch the shop clock like dispatch told you to, you are not entitled to receive your layover. If you go out to the unit, discover a problem, then go to the shop w/it, you are not entitled to the layover.