There are plenty of rules, 2 8 X 10 glossy color graphs, a 4 page flow chart and a 64 page Reserve User Guide
And that's just the stuff that the pilots standing reserve are given
Scheduling has a whole 'nother book of past practice and procedures that they use, and you can't see
Even with all that suck... I still only fly 20-30 hrs per month
Folks who want the $$ can usually break guarantee, and often max out