I believe this is what you are looking for.....you can find anything in the Domestic General Rules:

E) Compensation For Involuntary Denied Boarding
When a passenger with a confirmed reservation is involuntarily denied boarding on an oversold
flight pursuant to this rule, Delta’s sole liability to the passenger shall be to provide alternative
transportation as provided in subpart D, above, and to pay denied boarding compensation, if
applicable, pursuant to the terms and conditions of this subpart. Delta may offer alternative
compensation in an amount and form to be determined by Delta at its sole discretion in lieu of
the payment provided by this section. If accepted by the passenger, such alternative
compensation shall fully discharge Delta from any liability for the denied boarding.
1) Conditions For Payment of Involuntary Denied Boarding Compensation
The passenger shall not be entitled to any compensation for involuntary denied boarding if:
a) Passenger’s Failure to Comply with Contract of Carriage
The passenger has not complied fully with Delta’s contract of carriage or tariff
provisions regarding ticketing, reconfirmation, check-in, or acceptability for
transportation
b) Substitution of Equipment
The flight for which the passenger holds confirmed space is unable to accommodate
that passenger because of substitution of equipment of lesser capacity when required
by operational or safety reasons.
c) Carriage in Alternative Cabin
Delta offers to accommodate the passenger in a section of the aircraft other than that
specified on his/her ticket at no extra charge; provided however that if a passenger is
seated in a section for which a lower fare applies, the passenger will be entitled to a
refund of the difference in fare.
d) Alternative Transportation
Delta arranges comparable air transportation, or other transportation used by the
passenger, at no extra cost to the passenger, that at the time such arrangements are
made is scheduled to arrive at the passenger’s next stopover, or, if none, final
destination within one hour after the scheduled arrival time of the passenger’s original
flight or flights.
F) Amount of Involuntary Denied Boarding Compensation
If all conditions for compensation are met, then Delta shall pay compensation to passengers
involuntarily denied boarding in an amount to be calculated as follows:
1) Large Aircraft
If the involuntary denied boarding occurs on aircraft with more than 60 seats:
a) When Delta arranges Qualifying Alternative Transportation
If Delta arranges Qualifying Alternative Transportation, then Delta will pay denied
boarding compensation in an amount equal to 100% of the sum of the values of the
passenger’s remaining flight coupons of the ticket to the passenger’s next stopover, or if
none, to his/her destination, but no more than USD 200.00. Qualifying Alternative
Transportation means comparable air transportation, or other transportation used by the
passenger, at no extra cost to the passenger, that at the time such arrangements are
made is scheduled to arrive at the passenger’s next stopover, or, if none, final
destination within two hours after the scheduled arrival time of the passenger’s original
flight or flights.
b) Where Delta cannot arrange Qualifying Alternative Transportation
If Delta cannot arrange Qualifying Alternative Transportation, then Delta will pay denied
boarding compensation in an amount equal to 200% of the sum of the values of the
passenger’s remaining flight coupons of the ticket to the passenger’s next stopover, or if
none, to his/her destination, but no more than USD 400.00.
2) Small Aircraft
If the involuntary denied boarding occurs on aircraft with 60 or fewer seats, the amount of
denied boarding compensation will be 50% of the amounts described in the preceding
sections.
G) Time of Payment for Involuntary Denied Boarding Compensation
If all conditions for compensation are met, Delta will pay any involuntary denied boarding due
under this Rule on the day and at the place where the denial of boarding occurred, in cash or
immediately negotiable check; provided, however, that if the alternative transportation arranged
for the passenger’s convenience departs before the payment can be made to the passenger,
then payment will be made by mail or other means within 24 hours after the denied boarding
occurs.