Approval in principle is a term used in various contexts to indicate a preliminary or conditional approval that is subject to further review or conditions. Here are some examples of how the term is used:

• Human subjects research: An Approval-in-Principle (AIP) is designed to help facilitate review of research lacking definite plans for the involvement of human subjects in the research.

• Forestry: Approved in principle means that approval of the plan depends on any accompanying felling license permission being in place.

• Banking: Approval in principle is also referred to as a quotation, and it is an indication of the loan a bank is willing to offer an individual. Once a buyer receives this approval, they can use it to make an offer on a property.

• Product design: Approval in Principle (AiP) is a scheme for the examination of plans and documents based on the rules for products in the early design stage to confirm that they are in line with the rules and standards.

• Loan application: In principle approval loan is a loan which indicates whether a bank can potentially lend the amount to the borrower. It is a preliminary approval that is subject to further review and conditions.

In summary, approval in principle is a preliminary or conditional approval that is subject to further review or conditions, and it is used in various contexts such as human subjects research, forestry, banking, product design, and loan applications.