Lawn signage is used here also, but most do not date or time the application. The State doesn't require such. The sign is there for the customer to visually see you were there.?? I date mine and time it so they can't go back on me for not doing anything.
As far as my other lawns...........fertilizing granular is okay as long as the lco is mulching the grass. If there is postemerge for broadleaf weeds or sedge grasses, they better stay off the lawn. The problem of conflicting schedules happens quite often. This is why I got my license 9 years ago......................me and my competitor locked horns.