Complex sentence: Section 93 of the BNA act (1867) in the Province's opinion had been contravened with the Laurier-Greenway Compromise and no longer had legal vigour and moreover the province had ultimate authority to decide on minority language instruction.
Split into simpler sentences: Section 93 of the BNA act (1867) in the Province's opinion had been contravened with the Laurier-Greenway Compromise and no longer had legal standing. Moreover in section 93 of the BNA the province had ultimate authority to decide on minority language instruction.