Canonum De Ius Rex
Canons of Sovereign Law
II. Sovereign
2.5 Roman Law Form
Article 58 - Occupatio
Canon 5801 (link)
Occupatio does not, nor has it ever challenged the sacred principle of possession. Instead, occupation only applies to conquered land and states that a citizen of Rome may make a claim of “ownership” on a first claim, best claim basis reflected in a register. Thus occupation is the record or title of the register, not physical possession.
Canon 5802 (link)