The resignation by the Cabinet, which included seven members of the ruling al-Sabah family, underscores the ongoing tensions between government ministers and parliament members in the small Gulf Arab nation, the country's official news agency reported.
For decades, Kuwait has allowed the most politically vibrant culture in the Gulf. Opposition lawmakers have a powerful forum in parliament, often summoning officials to be questioned on policies.
Kuwaiti ruler Sheikh Sabah al Ahmad al Sabah has dissolved parliament in the past, however, when friction with the government became too high.
The Cabinet was only four months old and was formed after parliamentary elections in July. Those elections were called after a constitutional court threw out the results of a December 2012 poll.
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The Cabinet submitted its resignation only hours after the country's highest court issued a ruling that said July parliamentary elections were legal. If it had ruled otherwise, the body could have been dissolved.
KUNA quoted parliament speaker Marzouk al-Ghanem as saying today he had received a letter that all 16 ministers submitted their resignations. The emir is expected to accept them.
"In response, parliamentary inquiries will persist as will the risk of new parliamentary elections next year," the group said in a statement.