A service provider should have to affirmatively choose signup dates, and provide dates if choosing specific dates
Too many providers are leaving "Signup is ongoing" when that's not the case.
Simply not setting a default adds in the ugly "N/A" option, shown to providers, and that's not something we want to show or allow.
Setting to specific dates does not require the registration dates field.
Fix: Set to "Specific dates" by default and require the registration dates field if "Specific dates" is selected.
See location; if you choose a specific location it becomes required.