328 BILLS OF EXCHANGE AND PROMISSORY NOTES. [ART.13

2. Must contain an unconditional promise or order to pay a
sum certain in money;

3. Must be payable on demand, or at a fixed or determinable
future time;

4. Must be payable to order or to bearer; and

5. Where the instrument is addressed to a drawee, he must
be named or otherwise indicated therein with reasonable cer-
tainty.

21. The sum payable is a sum certain within the meaning
of this act, although it is to be paid:

1. With interest; or

2. By stated instalments; or

3. By stated instalments, with a provision, that upon default
in payment of any instalment or of interest, the whole shall
become due; or

4. With exchange, whether at a fixed rate or at the current
rate; or

5. With costs of collection or on attorney's fee, in case pay-
ment shall not be made at maturity.

22. An unqualified order or promise to pay is unconditional
within the meaning of this act, though coupled with :

1. An indication of a particular fund out of which reimburse-
ment is to be made, or a particular account to be debited with
the amount; or

2. A statement of the transaction which gives rise to the
instrument.

But an order or promise to pay out of a particular fund is not
unconditional.

23. An instrument is payable at a determinable future time,
within the meaning of this act, which is expressed to be pay-
able :

1. At a fixed period after date or sight; or

2. On or before a fixed or determinable future time specified
therein; or

3. On or at a fixed period after the occurrence of a specified
event, which is certain to happen, though the time of happen-
ing be uncertain.

An instrument payable upon a contingency is not negotiable,
and the happening of the event does not cure the defect.