ALES is AMA Provisional event #631, rules here:
www.modelaircraft.org/files/2013-2014Electric.pdf
Events are provisional for two years, ALES becomes official in 2015 if I recall correctly.
30 second motor run maximum. General requirements as follows:
(X).1 General Specifications
1 Maximum surface area 2335 sq.in. (150 dm.
sq.)
2. Maximum weight 11 pounds (5 kilograms)
3. Maximum surface loading 24.59 oz. per sq.ft.
(75 gr/dm sq.)
4. Maximum battery voltage 42 volts
5. Model aircraft with variable geometry or area
must comply with these specifications when the
surfaces are in maximum and minimum extended
mode.
6. Mechanical or chemical modification of the
individual cells of a battery (e.g. to reduce their
weight) is not allowed, except that insulation
sleeves of individual cells may be changed.
7. Any device, fixed or retractable, intended to
arrest the model aircraft on the ground, or which
does arrest the model aircraft on the ground,
during landing is prohibited.
8. No wing tip launches are allowed (discus,
side-arm, etc.),
9. All ballast must be carried internally and
fastened securely within the airframe.