Have the relevant third parties provided their consent? Do threats to compliance impair your independence? Are threats to compliance with the code at an acceptable level?
Most generally, instructions laid out in the contract itself. Other than that, they can be changed by consent of all parties, or in the case of a business, the majority of the stakeholders of the company .
Yes it right the 1st amendment
That would go against the 10th amendment say states make their own laws