Getting voluntary compliance with any sort of standard is always difficult. The Wall has 2 suggestions: 1) Have a carrot. Find a way to reward those who do follow the standard without punishing those who don’t. 2) Start ’em young. Students, junior faculty, and early career staff are far more receptive to the idea that presentations and work need to follow standards, even if it’s not a requirement. The more that brand standard pops up around the department, the more normalized it will be such that anything different looks strange. Good luck!