Brigid,
Thanks much for the link, I hadn't seen that. Actually, it was only the third and fourth chapters of kommisjonsloven that were repealed by agenturloven. My source is citing § 53 of the former, which remains in force.
I've just found an authoritative reference that uses "Commission Agency Act" for the 1916 act --
http://tinyurl.com/6cqhske. This serves perfectly to shorten the title and distinguish it from the 1992 act and the translation's suggested short title for the latter of "Agency Act". Huzza!