When I used the term civil procedure I couldn't remember "sui generis"
and could only remember it is applied against
civil office holders, typically by civil office holders.
From Constitution below: "Article I § 2 of the United States Constitution gives the House of Representatives the sole power to impeach (make formal charges against) and Article I § 3 gives the Senate the sole power to try impeachments. Article II § 4 of the Constitution provides as follows:
"The President, Vice President
and all civil officers of the United States,
shall be removed from office on impeachment for,
and conviction of, treason, bribery, or other high crimes and misdemeanors."
When I used the term civil procedure it was in reference to it's being applicable,
to civil office holders, and being practiced by civil office holders.
Paragraph 2 below:
"Article I § 2 of the United States Constitution gives the House of Representatives the sole power to impeach (make formal charges against) and Article I § 3 gives the Senate the sole power to try impeachments. Article II § 4 of the Constitution provides as follows:
"The President, Vice President and all civil officers *
of the United States,
shall be removed from office on impeachment for,
and conviction of, treason, bribery, or other high crimes and misdemeanors."