The company I work for is working under IAA "recommendations"! minimum rest away from base is 11 hours or the length of the previous duty period, or 12 hours at base!
If we did say 13 hours duty, over 4 sectors , quite possible with delays, tech a/c , waiting perhaps for wx improvement, its a signed crew fitness declaration on Flight Report, but we wont be asked to reduce our rest.
Guess Im lucky eh?
Hogg.