The aircraft is maintained by a maintenance plan and the plan is specifically tailored to that specific aircraft.
A company that operates multiple aircraft of the same type will have a majority of the maintenance plan commonly the same, but there are factors that influence the maintenance plan which means that each aircraft has its own specific plan.
If you look at a list of tasks for example in,then maintenance plan then there is often an “Applicability” column and registrations,or serial numbers are included so you can see which aircraft the tasks are for in the event that multiple aircraft are covered.