The Bab-el-Mandeb Strait - which the UN has stated is a strait to which transit passage applies. Yemen is a signatory country to the UN convention on the law of the sea. https://en.wikipedia.org/wiki/Bab-el-Mandeb
Transit Passage https://www.un.org/depts/los/convention_agreements/texts/unclos/part3.htm#:~:text=and hydrographical characteristics.-,2.,or an exclusive economic zone.
Specifically, article 38 states:
~~Right of transit passage
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In straits referred to in article 37, all ships and aircraft enjoy the right of transit passage, which shall not be impeded; except that, if the strait is formed by an island of a State bordering the strait and its mainland, transit passage shall not apply if there exists seaward of the island a route through the high seas or through an exclusive economic zone of similar convenience with respect to navigational and hydrographical characteristics.
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Transit passage means the exercise in accordance with this Part of the freedom of navigation and overflight solely for the purpose of continuous and expeditious transit of the strait between one part of the high seas or an exclusive economic zone and another part of the high seas or an exclusive economic zone. However, the requirement of continuous and expeditious transit does not preclude passage through the strait for the purpose of entering, leaving or returning from a State bordering the strait, subject to the conditions of entry to that State.
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Any activity which is not an exercise of the right of transit passage through a strait remains subject to the other applicable provisions of this Convention.~~*
I’ll take a look at the articles once I’m off work. I appreciate the discussion and your responses. Prior to reading them, though, it looks like it is talking about armed conflict, which is kinda the point I was making. Yemen (/the Houthis) have the right to blockade, but it is an act of war/falls in the realm of armed conflict. Would you say that is accurate?