Pilot dude
Thats the regulation so the local CAA have no choice. Asuming the boss is a AOC you would need to apply to the EU commission as its a change of law to the extended recovery rest period so not a derogation to EASA . This would need a FRMS , safety case with scientific support etc. It wouldn't be overnight and the argument about weekends would be a social one not necessarily fatigue basis.
Good luck is all I will say