(a) A utility that changes its name or merges or consolidates after filing a utility security instrument under Section 261.004 shall promptly file with the secretary of state a written statement of the name change, merger, or consolidation. The written statement must:
(1) be signed by the secured party and the utility;
(2) identify the appropriate utility security instrument by file number; and
(3) state the name of the utility after the name change, merger, or consolidation.
(b) Unless a written statement is filed under Subsection (a) not later than four months after the effective date of the name change, merger, or consolidations, the filing of a utility security instrument before the name change, merger, or consolidation does not constitute perfection or serve as notice under Section 261.004 of a security interest in property acquired by the utility more than four months after the name change, merger, or consolidation.