Can I avoid specifying a font in an RTF header?

I made the Arial font the only font, but the header appears to be Roman.
I have specified the right margin for the \ql body of the document, but I do NOT want to use that in the header so I \pard\qc the header (see below).

Please advise.
Thanks, Tracey
English Writer
Windows 2000sp4 and LibreOffice Version 3.6.7.2 (Build ID: e183d5b)

{\rtf1\fbidis\ansi\ansicpg1252\deff0\deflang1033\deftab720
{\fonttbl{\f0\fswiss\fcharset0
Arial;}} {\colortbl
;\red128\green128\blue128;}
\viewkind1\uc1\pard\ql\margr1440\f0\fs24
\ltrpar\keep\fi-720\li720\sa86
{\header\pard\qc Heading Text.\par}
}