This summary is not the rule. The rule text controls.
When you file an appeal, you need to follow a set schedule for turning in your written arguments, called briefs. The person appealing the case, known as the appellant, has 60 days to file their main brief after the court receives notice that the case record is complete. This clock starts ticking as soon as that notice is filed.
The other briefs in the case follow the same timing rules laid out in Rule 1.10(a). Everyone involved also needs to follow the specific requirements in Rule 1.10(a)(3), which covers things like how and when documents get delivered to other parties.
Beyond just deadlines, your briefs also have to look and read a certain way. Rules 1.10 and 1.11 spell out formatting requirements, like page limits, font size, and what sections your brief needs to include. Making sure your brief meets these standards is just as important as meeting the deadline, since the court can reject briefs that don't follow the proper format.