Apologies if this has been answered before but I am unable to locate in the forum

I am naturalized citizen married to Irish Born citizen (after 2005). I recently moved abroad with my spouse and was reading through form 5 (FORM 5 - IRISH NATIONALITY AND CITIZENSHIP ACT 1956).
In the form it states 'THIS FORM IS ONLY FOR NATURALISED IRISH CITIZENS RESIDING ABROAD, WHO WERE NOT GRANTED
A CERTIFICATE OF NATURALISATION AS A PERSON OF IRISH DESCENT OR ASSOCIATIONS.'
Question: What does 'Associations' mean? Does this mean I DO NOT have to submit this form?
Thanks