EXHIBIT 1
---------
AGREEMENT AS TO JOINT FILING OF SCHEDULE 13G
--------------------------------------------
Each of the undersigned hereby affirms that it is individually eligible to use
Schedule 13G, and agrees that this Schedule 13G is filed on its behalf.
Dated: August 22, 2012
CITIBANK, N.A.
By: /s/ Xxx X. Xxxxxxx
--------------------------------------------
Name: Xxx X. Xxxxxxx
Title: Assistant Secretary
CITICORP
By: /s/ Xxx X. Xxxxxxx
--------------------------------------------
Name: Xxx X. Xxxxxxx
Title: Assistant Secretary
CITIGROUP INC.
By: /s/ Xxx X. Xxxxxxx
--------------------------------------------
Name: Xxx X. Xxxxxxx
Title: Assistant Secretary