On the other hand, in Australia, in the Disability Discrimination Act which outlaws most types of discrimination against people with disabilities, there is a specific exempton that protects the right to discrimninate against people with disabilities:

DISABILITY DISCRIMINATION ACT 1992
- SECT 52
Migration
Neither Division 1 nor 2:
(a)
    affect discriminatory provisions in the Migration Act 1958 or any regulation made under that Act; or
(b)
    render unlawful anything done by a person in relation to the administration of that Act or those regulations.

Do Australian Mudcatters really feel happy about this? More especially when it is applied to break up famiies?