Revise Montana arts council chair responsibilities

Removed the specific title 'Chief Executive Officer' from the Presiding Officer position, changing the language to indicate the Presiding Officer serves as the chief executive officer of the council without a separate title.

Added enrolled bill certification language and signature blocks for the Chief Clerk, Speaker of the House, and President of the Senate to formalize the bill's final passage.

Changed bill header formatting from 'HB 786.1' to 'HB 786' and reorganized the document structure to match standard enrolled bill format.

Bill designation changed from LC 1899 to HB 786.1

Primary sponsor J. Darling was identified

Document header updated to reflect House Bill format