The phrase "addition to other requirements" means that there are additional rules or conditions that need to be met, on top of the ones that have already been mentioned or stated. Full definition
Also, in addition to any other requirement of applicable law, all children 12 and under should ride in the rear seat properly secured in child restraints, booster seats, or seat belts according to their size. (nissan.ca)
The heightened minimum fine or minimum community service is in addition to all other requirements typically associated with a Virginia DUI conviction. (pricebenowitz.com)
In that case, the Florida DHSMV will order the driver to attend an ADI course, in addition to other requirements for license reinstatement. (floridasfirsttrafficschool.com)