In connection with the Annual Report of Permian Basin Royalty Trust (the
“Trust”) on Form 10-K
for the annual period ended
December 31, 2005 as filed with the Securities and Exchange Commission
on the date hereof (the
“Report”), the undersigned, not in its individual capacity but solely as
the trustee of the Trust, certifies pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906
of the Sarbanes-Oxley Act of 2002, that to its knowledge:
A signed original of this written statement required by Section 906 has been provided to the
Permian Basin Royalty Trust and will be retained by the Permian Basin Royalty Trust and furnished
to the Securities and Exchange Commission or its staff upon request.