Why is Disability info dependent on country value for self-service?

When login as employee, navigate to Me tab then Personal Details; on the Personal Details Page, under the Disability Info section, if we tried to add a disability info, we must first select a country.

When we login as HR and navigate to My Client Groups then Personal Details, on the Personal Details Page, under the Disability Info section, if we tried to add a disability info, the disability info is not dependent on country.

Is there an explanation to why is the disability info dependent on country for self-service?