What is the role of locks in managing planning cards?

Locks allow you to lock or unlock tasks to control who can modify planning cards. Their behavior depends on whether the user is a team member or a team manager.

For a team member (not a manager):

You can lock tasks in your own schedule.
You can lock tasks in your team members’ schedules.
You can lock tasks in your manager’s schedule.
You cannot unlock a task that your manager has locked for you.
You cannot unlock a task another colleague has locked for themselves.
You can unlock a task that another colleague (who is not your manager) has locked for you.
You cannot unlock a task locked by someone who is not your manager.

For any request to unlock a card you do not manage, please contact the person responsible for that card.

For a team manager:

You can lock tasks in your own schedule.
You can lock tasks in the schedules of all team members.
You can unlock tasks that people under your responsibility have locked for you.