A registration rule is not a promise of a seat
1A community centre is planning a repair workshop. Its notice says, 'You cannot join the workshop unless you register by Thursday.' Registration helps the organiser prepare equipment, but the notice does not promise a place to every registered person. The room has a limited number of seats, and applicants must wait for a separate confirmation.
2Mina registers on Wednesday. She tells a friend that her seat is now guaranteed. The friend points to a second sentence: 'We will send a confirmation if a seat is available.' Mina has met the registration deadline, but she has not yet received that confirmation. The two sentences describe different stages of the process.
3Joon does not register by Thursday. Under the stated rule, he cannot join this workshop. His interest in repairing a broken lamp does not replace registration. The organiser then writes a clearer reminder: 'If you do not register by Thursday, you cannot join the workshop.' This restatement keeps the original restriction; it does not create a new promise for those who register. Before making plans, both learners need to distinguish a required step from a confirmed result.