What is the specific scope of a motion under Habeas Rule 4?

This specificity requirement is necessary to assist courts in fulfilling the Habeas Rules screening function. Under Habeas Rule 4, courts must "promptly examine" each petition, and dismiss a petition "[i]f it plainly appears from the petition and any attached exhibits that the petitioner is not entitled to relief in the district court." Rule 4, Rules Governing Section 2254 Cases. This reflects a congressional command, see 28 U.S.C. 2243, which makes it "the duty of the court to screen out frivolous applications and eliminate the burden that would be placed on the respondent by ordering an unnecessary answer," Rule 4, Rules Governing Section 2254 Cases, advisory committees notes (citing Allen v. Perini , 424 F.2d 134, 141 (6th Cir. 1970) ).