No IVs.

No aid of any kind from an outside source and/or person.

No using any shelter other than nature’s shade (i.e., boulders, creosote bushes, trees, etc.).

You must have everything from start to finish: food, clothing, equipment, and all necessary water. If a water source along the course is available, it cannot be used.

Trailers or any other apparatus are allowed as long as that apparatus is pushed, pulled, or carried. No motorized trailers. The trailer or apparatus can be disposed of only at the Lone Pine Junction (the intersection of Whitney Portal Road and Hwy. 395) or the Whitney trailhead.

With the exception of water, nothing can be disposed of along the way, not even trash.

Medical emergencies must be dealt with and/or administered by the individual only. No help or supplies can be used from an outside source.

Only a.m. starts are valid.

No leaving the course is allowed; you must remain on the course at all times.

There must be at least one person monitoring the above compliances at all times.

As you can see, some of the rules have been further restricting. This was done only to make the solo attempt as “clean” as possible. With the rules in place, the definition of “solo attempt” is indisputable.