Can I write to the LA tailoring the ipsea letter template (url below) to request the final EHCP within 5 days as it has not been issued within 8 weeks of the intention update?

url of the letter template :

https://www.ipsea.org.uk/letter-to-la-when-i…

1. The above page has a helpful letter template.
2. The template specifically mentions the KS transfer deadlines i.e. 15 February / by 31 March / no less than 5 months before the transfer takes place.
3. The letter asks for action within 5 days.

Reasons for my query are:

My son is due to transfer to post-16.
It's been greater than 8 weeks since intention to amend letter.

BUT:
March 31st deadline for post-16 transfer is still a month away, so not breached.

SO;
I am wondering if this template/process is only relevant for the breach of "5 February / by 31 March / no less than 5 months before the transfer takes place" or can it be used in my case?