In the phrase "different forms are provided to accommodate multiple disabilities", the word "multiple" could be read as saying these forms should address the needs of an individual with multiple disabilities, which is a nice goal but not the baseline requirement.
Proposed Change:
Change "different forms are provided to accommodate multiple disabilities" to "different forms are provided to accommodate different disabilities".
The bullet has been revised to read:
If the purpose of non-text content is to confirm that content is being accessed by a person rather than a computer, then text alternatives that identify and describe the purpose of the non-text content are provided and alternative forms in different modalities are provided to accommodate different disabilities