The dubious goals/assists panel

When is an assist awarded (and not awarded)? The following are the guidelines that have been followed up to now.

1. A person making the last pass before a goal is scored earns an assist.
2. A person fouled for a subsequently converted penalty earns an assist.
3. A person who took a shot that was parried/saved into the path of a goal scorer earns an assist.
4. If a defensive intervention significantly alters the path of an intended pass then no assist is awarded.
5. If a defensive intervention results in an own goal, an assist is awarded.
6. A person fouled for a subsequently converted direct free kick does not earn an assist.