Isn't the writer of a law the ultimate authority and final say in its interpretation?

[Swede Atlanta]

9. Actually no.......

A law may originate with an individual but it requires the statutory procedures and votes by the legislative and executive branches to enact an idea.

Enforcement is the responsibility of the executive, i.e. the governor in a state and by proxy, local officials.

The ultimate "decider" as to the application and constitutionality of a law is the jurisdiction's highest court, in this case the Florida Supreme Court. Federal courts are involved when the issue involves a matter of federal law or Constitutional scrutiny.