Answer: Financial accounting is more highly regulated than managerial accounting.
Step-by-step explanation:
Financial Accounting is meant to provide information about a company to stakeholders which includes investors, potential investors, creditors and the like. For this reason, it is quite regulated. In the US, the GAAP governs Financial Accounting and guides how information should be accounted and presented and in the rest the world IFRS is usually used. This shows how regulated Financial accounting is.
Managerial Accounting on the other hand is meant to provide information based on the figures on how a company can take advantage of the numbers. They are therefore less regulated and can involve tests that cannot be done in financial accounting. Managerial Accounting is not even regulated by GAAP.