Answer
(Fatwa: 702/686=L)
It is narrated in Hadith: المسلمون عند شروطھم (او کما قال علیہ السلام), Muslims should keep the agreements they make. And we have been prohibited to revolt: ونھِینا عن غدر و غلول (الدر المختار: 6/212) (We have been commanded to refrain from rebellion and cheating.) Therefore, one should abide by the law of one’s country until it contradicts the Shariah.
(2) First, there was no government. Secondly, had there been any tribal system, then you should point out the examples which were in opposition with Shariah and the Prophet (peace be upon him) did not oppose it.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband