Description of Priority categories Accordingly, DVR establishes the following categories for service provision: Priority Category I, Individuals with the Most Significant Disabilities (MSD) Eligible individuals with impairments that result in serious limitations of three or more functional capacities that require multiple vocational rehabilitation services over an extended period of time, six months or more. Priority Category II, Individuals with Significant Disabilities (SD) Eligible individuals with impairments that result in serious limitations in one or two functional capacities requiring multiple vocational rehabilitation services over an extended period of time, six months or more. An allowed SSDI beneficiary or SSI recipient is automatically considered to be, at least, an individual with a significant disability, and should be reviewed for possible Priority 1 status. Priority Category III, Individuals with Non—Significant Disabilities Eligible individuals with a disability who do not meet the definition for MSD or SD.