http://www.davidgladden.com/jw/Docs/branch_organization_manual_bo-e.pdf
page 24-1
4. Those used as writers (for the Watchtower and Awake!) must be dedicated, baptized brothers or sisters in good standing with their local congregations and who have writing ability. They should be exemplary, modest, not inclined to talk loosely to others about their writing activity. Sister may be found to be especially talented in writing articles of interest to women. However, they should not be used to prepare articles that are basically an exposition of Scripture. Whenever anyone is given an assignment to write an article for The Watchtower or Awake!, that person should be given a copy of the memorandum "Writing for Our Journals." It is not necessary that the person read the Standards Manual if that is available locally. However, the one in the branch responsible for sending in the article should be well acquainted with this publication and follow its rules when editing material submitted. This will do much to assure that articles will be usable for publication.