1. Contract intent vs literal interpretation – Intent overrides literal 2. Contra Proferentem – if contract is not clear, interpretation favor those who didn’t write it 3. Agency and Authority – the professional is given authority by company to guide 3 party contractors 4. Indemnity – one party agrees to bear damages for another party, eg insurance 5. Paral Evidence Rule – law that states any info that is not on a contract has been omitted for a reason and prohibited as evidence, if wanted to be included the contract must be amended