How an ESE student becomes "eligible" for Occupational Therapy (?)

Trying to make sense of words, because they are important.

I really need some help on this one.

How does a student become "eligible" for occupational therapy under the Individuals with Disabilities Education Act (IDEA)?

All answers appreciated. Take nothing for granted.

I have just read something that may interrupt my enjoyment of the Buc's game and the PPV Ultimate Fight.

I need some validation quick before my head explodes.