legal requirements: K3C155, K3M156, K3D157 unit 301

Hello am new to this site but have found it so helpful so far!! Basically there are a few points I am unsure about in the knowledge section of unit 301. The first ones are about legal requirements: K3C155, K3M156 K3D157.
The only legal requirements I can see is the Children’s Act 1989.…is this correct for these answers?? Or does it mean policies and procedures (are these actual law?)
The other point are K3D178: strategies you can use to challenge and deal with different types of behaviour which are consistent with your organisations policies…. I have already discussed our behaviour policy in another point, so is this all that’s required for this question, just an explanation of how we deal with behaviour???
Would be extremely grateful if anyone knows the answers as I have been trying to research it for hours and just don’t seem to be getting anywhere!!! Many thanks

Just thought of one more little thing: K3D162: what is meant by appropriate and inappropriate behaviour when interacting with children… does this mean our behaviour in how we treat them or the types of behaviour that we expect from them??

Sorry I know its being a bit cheeky for asking so many answers but I really would be grateful!!