Which Class and Ruleset should be used for correct placement of field values for assignment instructions (pyInstructions) and audit notes(pyHistoryMemo)?

At present, i am assuming as below:

Assignment Instructions (pyInstructions) - 

• Class used:    @baseclass
• Ruleset used:  Famework/Implementation Ruleset

Audit Notes (pyHistoryMemo) - 

• Class used:    Work-
• Ruleset used:  Famework/Implementation Ruleset

Is above assumption correct? Or should we place them in Enterprise level ruleset? Or in any diff. Class?