Final answer:
The validity of a school bus driver improvement course certificate varies by jurisdiction and must be verified with the relevant Ministry of Transportation.
Step-by-step explanation:
The validity period of a course certificate for successful completion of a school bus driver improvement course approved by the Ministry of Transportation is dependent on the specific regulations and standards set by the issuing authority, which can vary based on jurisdiction. Typically, these certifications are valid for a set number of years to ensure that drivers maintain up-to-date safety skills and knowledge. Without citing a specific region or law, one cannot accurately provide the validity period. It is essential to refer to the relevant Ministry of Transportation's regulations or contact them directly for the most precise and current information.