On the 3rd step of the author's submissin forms you can find:
Contributors and Supporting Agencies
Identify agencies (a person, an organization, or a service) that made contributions to the content or provided funding or support for the work presented in this submission. Separate them with a semi-colon (e.g. John Doe, Metro University; Master University, Department of Computer Science).
A few editors reported that will be very useful to set "Agencies" as a mandatory field, otherwise author's forget this information that right now is important to be published.
An smarter solution (autocomplete, tags...) could be the best choice, but right now, the help text could be extended with "If no agencies fund or support this research, write "None" in the Agencies field". (in bold, to make it easy to read).
I'm talking about OJS 2.x and I'munsure if this requirement is solved in OJS 3.x