GOV.UK
Working the Examination: Time to comply to be stated in notice
The S14/15/16 notice must state the time by which the information must be provided, and this time should be at least 30 days from the date of the notice.
The 30 days should be calculated from the date that the notice will leave the office, typically the day after you have written it.
Use the standard letter template TCC6A.
When you issue a formal notice to a claimant requesting information or evidence you must issue a copy of fact sheet WTC/FS3. This explains what will happen if the claimant does not supply the information you are seeking.
If your case is a post award examination and you are considering suspension in the event of ongoing failure to supply the information, you must issue letter TCC106 and fact sheet WTC/FS9.