17 C.F.R. § 270.2a41-1
(a) A standby commitment means a right to sell a specified underlying security or securities within a specified period of time and at an exercise price equal to the amortized cost of the underlying security or securities plus accrued interest, if any, at the time of exercise, that may be sold, transferred or assigned only with the underlying security or securities. A standby commitment entitles the holder to receive same day settlement, and will be considered to be from the party to whom the investment company will look for payment of the exercise price. A standby commitment may be assigned a fair value of zero, Provided, That:
[51 FR 9779, Mar. 21, 1986, as amended at 56 FR 8128, Feb. 27, 1991; 61 FR 13982, Mar. 28, 1996; 62 FR 64986, Dec. 9, 1997]