[O] How to get LATEX_HEADER items to appear *after* default packages?

[Richard Stanton]

When I export an org file to LaTeX using the class rhs-article, defined as 
follows:

             ‘("rhs-article"                          
               "\\documentclass{article}
\\usepackage[top=1in, bottom=1.in, left=1in, right=1in]{geometry}
 [PACKAGES]
 [EXTRA]" ;;header-string
               ("\\section{%s}" . "\\section*{%s}")
               ("\\subsection{%s}" . "\\subsection*a{%s}")
               ("\\subsubsection{%s}" . "\\subsubsection*{%s}")
               ("\\paragraph{%s}" . "\\paragraph*{%s}")
               ("\\subparagraph{%s}" . "\\subparagraph*{%s}")))

I see that my headers defined using #+LATEX_HEADER appear in the resulting 
LaTeX file before the default packages defined in 
org-latex-default-packages-alist. How can I get the default packages to appear 
BEFORE the LATEX_HEADER items? Or better yet, how can I control things so that 
I can choose whether a LATEX_HEADER item appears before or after the default 
packages in the LaTeX file?

Thanks for any suggestions.

Richard Stanton