Lawmakers interested in regulating in relation to environmental issues must bear in mind which aspects of the physical environment fall under Federal jurisdiction, which are under Provincial jurisdiction, and which may be
regulated by both levels of government.
The chronology is that a Member State decision is made at the purely internal
level to withdraw; this withdrawal is then communicated to the Union
by the bridging communicative act
of the
government giving notice to the European Council; consequently, this triggers the procedural EU law
regulating the conditions
of withdrawal.