Terry
All three of those organisations require a degree or diploma to obtain membership to my knowledge. Sorry to be pedantic but being a registered tax agent isnt as simple as working for ITP for 8 years. Not now.
Yes, FPA do now. But existing members of the FPA for example don't need a degree, neither does the SPAA as far as I know. Someone with relevant experience could still possibly become registered as a tax agent without a degree.