The phrase "necessary arrangements" refers to taking all the steps or actions that are needed for something to be properly organized or prepared. Full definition
If you don't speak the local language, a translator may be available to assist you in making necessary arrangements for medical care or getting a ride back to your living quarters. (creditsesame.com)
Maintained and scheduled appointments, made necessary arrangements for hearing conferences and meetings. (jobhero.com)
In addition, if a pet becomes very ill, guardians and family members should make necessary arrangements in caring for the sick pet. (articles.orlandosentinel.com)