CEDAW Article 4: Permits temporary measures, like quotas, without calling them discrimination
Article 4 isn't a mandate the way Articles 2 and 3 are. It exists to answer a specific objection states raised early on: if a country introduces quotas, set-asides, or preferential treatment to help women catch up, doesn't that itself count as discrimination against men? Article 4 says no.
What it states
Article 4 has two parts, doing two different jobs.
The first, Article 4(1), covers temporary special measures such as quotas, targeted recruitment, reserved seats and preferential funding, aimed at achieving real, not just formal, equality. It says these measures are not discrimination, and it builds in an expiry date: they're meant to end once the equality they're chasing has actually been achieved.
The second, Article 4(2), is different in kind. It covers special measures protecting maternity, things like paid leave, workplace protections during pregnancy. Unlike 4(1), these aren't temporary and aren't tied to any future finish line, because they're not correcting a historical imbalance. They're responding to something biological that doesn't go away once equality improves.
The permission article
Article 4 tells a state what it's allowed to do without being accused of breaking the Convention's own equality principle. Without it, a country trying to run a gender quota for parliament, or a targeted hiring program, would have to defend that program against the charge that treating women differently is itself discriminatory. Article 4 closes that argument off in advance. Different treatment, in pursuit of actual equality, is not the thing this Convention prohibits.
Reservations
Article 4 draws almost no reservations, and for a similar reason to Article 3: it doesn't obligate a state to do anything specific. It clears the way for action a state might choose to take. It doesn't require the action itself. There's nothing costly for a government to object to in a clause that only grants permission.

