Help Please - NCAA Transfer Rules Question

This one came up in conversation with a friend over the weekend, and I told him that I do not know the answer, but I know a place where there are people who do ... so here goes ...

What are the rules for a student athlete transfering between NCAA divisions at all levels? My current understanding is:

A student-athlete can transfer from a JUCO or NAIA school to an NCAA D1, D2 or D3 school and play immediately (no sitting out).

A D1 athlete can transfer to a D2 or D3 school and play immediately, but if he/she transfers to another D1 school he/she must sit out a year, barring special circumstances.

An athelte who transfers from a D1 school to a D2/D3 school can transfer back to another D1 school after a minimum of 1 academic year and resume D1 competition without sitting out.

A D2 or D3 athlete can transfer to another D2 or D3 school without sitting out a year.

A D2 or D3 athlete can transfer to a D1 school without sitting out a year (just like a JUCO).


How am I doing? Please correct me where I am wrong, and please add any possible scenarios I may have missed. Thank you in advance for your shared wisdom.

And I'm betting this is one for 3fingeredglove, right ?