"Newly": Doesn't count any country that has already legalized it now or has set a future date for when it will be legal (like Estonia has). But any country that formalizes legalization at a future date, even if that date is after 2029, does count so long as the decision was locked in before 2030.
! Doesn't need to qualify in such a way that the country would change to dark blue on this Wikipedia map, since this specific question allows for partial legalization for specific populations. Instead it's maybe useful to compare with this map. !
For this question, a country is a state party within the United Nations System or recognised by at least one UN member state. And: a Muslim-majority country is a country with 50% or more of the population counted as Muslim by reliable sources when the decision to legalize same-sex marriage union was decided.
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