How many days after publication do the Rules and Regulations including the Code of Ethics of the Board of Aeronautical Engineering take effect?

The Rules and Regulations, including the Code of Ethics of the Board of Aeronautical Engineering, typically take effect 15 days after their publication. This duration is established to provide time for stakeholders, including practitioners and the general public, to become aware of and adapt to the new regulations. It ensures that all relevant parties have the opportunity to review the changes and prepare for compliance before the new rules are enforceable. This practice is common in legislative and regulatory contexts to support transparency and fairness in the implementation of new laws or guidelines.

The options denote different periods, but the standard and most widely applied timeframe in these contexts for such changes is generally 15 days, which is why this answer is the correct one.