Access on commandButton

Hi,

I am working in Ax 2012. I have a question regards access and security. I have a Actionpane on the form. Within this actionPane there is a buttongroup and within that button group, there is a command button.

I do want to set the access of command button for the accountant role. Only Accountant role can view it, not anyone else.

How can I do it?

Abhishek