Greta - the legislation re NPPR -the Local Govnt Charges Act- states that one is exempt from NPPR on the property which is " the sole or main residence." That suggests that PPR is one's main residence.
But you state that one can declare a property as PPR even if one uses it just "sometimes"
I can understand living in a place only sometimes can still be one's PPR if one is travelling around and staying in many different places on business or a very long vacation.
But if one is staying in one place ,say 90% in Cork and 10% in Sligo can one really claim that the Sligo property is one's PPR ?
I'm not arguing -just seeking source of your definition/explanation of PPR.