If it was me i'd ask them about putting on the locks that just cap on not the ones that go down in the tank and i'd tell them hey i'll take them off when i leave the house i just need them for when i'm home but tha tmight not work either.
just a suggestion it's been a long time since i had to worry about what i did to a company truck... I just don't get why they would care.,. oh well.. i wish you luck