Giving assent to a bill passed by the legislature is a normal constitutional act performed by the Governor, but of late, they have become a source of confrontation between State governments and the Governors.
To know more about the tussle between Governor and Chief Minister, click here
In the UK it is unconstitutional for the monarch to refuse to assent to a Bill passed by Parliament. In Australia, refusal of assent to a Bill by the crown is considered repugnant to the federal system.
References