Variable: LaTeX-header-end
LaTeX-header-end is a variable defined in latex.el.
Value
"^[^%\n]*\\\\begin *{document}"
Documentation
Default end of header marker for LaTeX documents.
Source Code
;; Defined in ~/.emacs.d/elpa/auctex-14.1.2/latex.el
(defvar LaTeX-header-end
(concat "^[^%\n]*" (regexp-quote TeX-esc) "begin *"
TeX-grop "document" TeX-grcl)
"Default end of header marker for LaTeX documents.")