Deaf teacher in NYS is attending a conference out of town for professional developmnt. Teacher is a member of an organization, and this organization is hosting its annual conference.

According to NYS ADA law....who has to pay for interpreting services for this teacher? The school she works at...or the organization hosting the conference?

Any details be greatly appreciated
The teacher chose to go to this conference, but NYS mandates that all teachers under the new certification requirements attain 150 hours of prof. development every 5 years....this is the reasoning for going to the conference.