If the incumbent prime minister can no longer serve (died, permanent incapacitation or criminal conviction), when the government is "deemed to have resigned" to become an interim government, they appoint a different person from their own government to the role of an "interim prime minister" (either the acting prime minister or else) until a new government is placed in power. This is a legal reference both to the change of a prime minister in office and in same government, a change in their legal status.