When does a new JAA regulation come into executive power?

The correct answer highlights the critical process through which a new Joint Aviation Authority (JAA) regulation becomes enforceable. A JAA regulation does not automatically take effect upon publication or the release of a draft. Instead, it requires a step where each National Aviation Authority (NAA) of the member states must incorporate that regulation into their respective national laws. This integration is essential because each country operates under its own legal framework, and only through this national adaptation does the JAA regulation gain the force of law within that country.

Providing this context emphasizes the importance of the NAA's role in ensuring compliance with regulations at the national level, reinforcing the fact that regulatory frameworks in aviation require harmonization across different jurisdictions before they become applicable. This distinction is crucial for understanding the regulatory landscape in aviation and the collaborative mechanisms that exist between international bodies and national authorities.