On July 23, 2013, “High Note” label released “Costumes Are Mandatory”, the sixth Ethan Iverson album. It was recorded in August 2012, at “Brooklyn Recording” in Brooklyn, New York, and was produced by Ethan Iverson.

Personnel:

• Ethan Iverson – piano, liner notes
• Lee Konitz – vocals, alto saxophone
• Larry Grenadier – bass
• Jorge Rossy – drums
• Pete Rende – engineer
• Kevin Blackler – mastering
• Brad Wrolstad – design
• Julie Worden – cover photography
• John Rogers – personal photography’s 
• Joe Fields – executive producer

Track listing:

All tracks by Ethan Iverson, except where noted.

1. Blueberry Ice Cream (Take 2)
2. Try a Little Tenderness – Harry M. Woods, Jimmy Campbell, Reg Connelly
3. It’s You (Tempo Complex) – Lee Konitz
4. It’s You – Lee Konitz
5. What’s New? – Bob Haggart, Johnny Burke
6. 317 East 32^nd – Lee Konitz
7. Body and Soul – Johnny Green, Edward Heyman, Robert Sour, Frank Eyton
8. Blueberry Hill – Vincent Rose, Larry Stock, Al Lewis
9. A Distant Bell
10. Bats
11. Mr. Bumi
12. My New Lovers All Seem So Tame
13. My Old Flame – Sam Coslow, Arthur Johnston
14. Blueberry Ice Cream (Take 1)