override section numbering in aastex class

In the article (AASTeX) document class, is there an option to globablly
override section numbering? If not, can it be done in the preamble, how?
Unfortunately, the *section, *subsection options do not appear in the drop
down list. I do not want to use ERT because I am collaborating with someone
who started using LyX, so it is OK to put some ERT formating in a few
places, but that would be nasty through all the document.