may enter into a formal settlement agreement, or an informal one, with the charged party. If a formal agreement is chosen by the Regional Director, the ensuing order, as a form or vehicle of his determination, is reviewable by the Board under the Act for its final disposition. However, if an informal agreement is made with the charged party, no order issues from the Board, and the sole route of review, under the rules and regulations of the Board, leads to and ends with the General Counsel. The respondent Board concedes that its final orders are judicially reviewable, but contends that informal agreements of its agents are not reviewable. The petitioning Company insists that respondent's argument is anomalous in that mere choice of the procedural form in theseacting as "agent" for the General Counsel, but under the direct authority of the Board through its Rule 102.18, 29 CFR. His dismissal of the complaint, acting with the authority and on behalf of the Board, was no less "final" than direct action by his principal, the Board itself. The Board's Rule 102.19, 29 CFR provides for review by the General Counsel of the Regional Director's "refusal to issue" a complaint; but "withdrawal" of a complaint by the Regional Director "on his own motion" under Rule 102.18, which does not provide an avenue of review under the Board's Rules, would usurp the statutory authority of the Board. The vesture of such absolute, unreviewable authority in subordinate administrative agents demands most explicit declaration by Congress to that precise effect,