Scaffold Safety

No, however tagging the scaffold as "complete" (green tag), "incomplete" (yellow caution tag), or "do not access" (red danger tag) is a best practice highly recommended, especially where various groups will be accessing the scaffold. It serves as a means of communication between the scaffold competent person and those using a scaffold.

Yes, but once it has been used as a mud sill, it cannot be used as a platform plank again.

No, but the scaffold competent person must be onsite to perform daily inspections of the scaffolding and available if problems or questions arise.

Not necessarily. You may assume the worst class of soil (Class C) and use mud sills of the required size for that class of soil.