I would use these terms interchangeably in this context based on what I found here:

http://www.freemanfirm.com/Case-Marant.txt

"The principle of concurrent or joint responsibility was stated as the first substantive legal precept in the charge. It was reiterated later when the court told the jury that it was their job to decide if the stevedore was "solely or concurrently" responsible and it was, at least by implication, reinforced when the court charged that "the duty to provide a reasonably safe place to work can rest upon more than one party, and it includes the owner of the vessel."

and here:

http://www.thisdayonline.com/archive/2004/05/23/20040523news...

"...In other words, it is very important to note that public safety and public order is the joint or concurrent responsibility of both Governments.[...] I must not leave the issue of the joint responsibility of the Federal and State Government without saying a few words about the provisions contained in [...]"

Your assumption that "seguridad activa y pasiva" would be "active and passive safety" is correct. See:

http://www.crashtest.com/explanations/safety/index.htm

=)