25th amendment sequence of events to install vice president?

The events are as follows:

1. The VP and a majority of cabinet officers write a declaration of the President's inability and send it to the president Pro Tempore of the Senate and the speaker of the House.

2. The Vice president becomes acting President

3. The President writes a declaration declaring his capability and resumes office.

4. The VP and a majority of Cabinet Officers again declare the President's inability .

5. Both houses by 2/3 majority declare that the president is incapable of performing hs duties

6. The VP continues as acting president.

There are time limits given for each step and default actions if the time limits are not met. My understanding is that steps 3, 4 and 5 can be repeated.