CF: Start & end on tonic. Single climax (not at endpoints). Range ≤ 10th. Mostly stepwise. No 7ths, tritones, aug 2nds. Max 2 consecutive leaps, not in same direction. Approach final by step.
1st Species: Begin P1/P5/P8 (P1/P8 if below). End P1/P8. All consonant. No parallel or direct 5ths/8ves. ≤3 consecutive 3rds/6ths. Avoid 3+ consecutive perfect consonances. Unisons only at endpoints. Max P12. Contrary motion to final. Independent climaxes.