One of the conferences requires paper submission in Helvetica Font. But the provided template uses standard math package, making the the document inconsistent.
This gist shared a way to set Helvetica Font without using XeLaTeX:
\renewcommand{\familydefault}{\sfdefault}
\usepackage[scaled=1]{helvet}
\usepackage[helvet]{sfmath}
\everymath={\sf}