Explanation of Article 151
This article stipulates that agency by necessity is realized even if the agent has undertaken a matter for himself, in addition to undertaking a matter for someone else, whenever there is a connection between the two matters that prevents one from being carried out separately from the other. This confirms that agency by necessity is not limited to handling a matter purely for others, but can also include cases where there is an overlap of interests.
Related To
Article 151
Officious intermeddling shall be deemed to have occurred even if the intermeddler, while performing an act for himself, performs an act for another person due to the inseparability of both acts.