A recently passed law requires all places of public accommodation to eliminate discrimination against persons with disabilities by removing all physical barriers to accessibility.
Conclusion
Private schools are legally obligated to make campuses physically accessible to people with disabilities.
Evidence
The law says that all places of public accommodation have to remove all physical barriers to accessibility for persons with disabilities. (i.e. make the place physically accessible to persons with disabilities.
Evaluate
This argument has a pretty straightforward form. What would we be assuming if we said this: All Yankees fans are jerks. Thus, Tommy is a jerk.
We'd be assuming that Tommy is a Yankees fan.
Here we have this: All places of public accommodation must be accessible. Thus, private schools must be accessible
So what are we assuming?
Goal
Private schools are places of public accommodation.