When a contract has multiple elements, how does GAAP determine if one of the elements should be

Question:

When a contract has multiple elements, how does determine if one of the elements should be considered a separate unit of accounting?
GAAP
Generally Accepted Accounting Principles (GAAP) is the accounting standard adopted by the U.S. Securities and Exchange Commission (SEC). While the SEC previously stated that it intends to move from U.S. GAAP to the International Financial Reporting Standards (IFRS), the...