Discrimination occurs where a person is given less favourable treatment than someone else. There are a number of grounds under which it is unlawful to discriminate against a person.
Direct discrimination occurs when a person is treated less favourably than another person in the same or similar circumstances. For example, unlawful sex discrimination may arise if a person is refused a job interview because she is a woman.
Indirect discrimination occurs when there is a requirement that adversely impacts on a particular person with an attribute covered by anti‑discrimination legislation (e.g. sex, race, marital status, etc). There may be no intention to discriminate, but the conduct or decision leads to a discriminatory effect if the conditions imposed are not reasonable.
For example: it may be indirect discrimination if the only way to enter a public building is by a set of stairs as people with disabilities who use wheelchairs are unable to enter the building.