Waiver

Here's a link to the FAQ section of the website dealing with this.

While the Certificate states 4900' AGL, we prefer to limit flights to 3900' AGL if the wind is in the best direction and we know the skills of the flyer. If the wind is blowing toward the trees or houses, even 2000' with dual-deployment may be too high.

That's where the Windy link on the right side of the computer screen comes in handy; you can get wind vectors at certain altitudes and information on cloud deck levels, too.