If a Soldier gets put on a 6 month special duty (Honor Platoon) should an NCOER be done by that detail or just provide input?

So here's what I have found. AR 623-3 3-48 and 3-49 talks about temporary duty, special duty etc. It says in 3-48 if the duty is greater than 90 days then the NCO is due an evaluation. It also says in table 3-1 that if greater than 90 days then the new supervisor is to do an eval. It also states that letter's of input are only to be provided for details less the 90 days.
SO to me that means Im supposed to do an eval before he leaves and he is also supposed to get one from the 6 month detail.

If the Honor Platoon will be the NCO's primary duty and differs from their normal duty, he would need a "Change of Duty" evaluation.

On the flip side, if the Honor Platoon is only an additional duty, it should then only be sited as such in the Annual/Change of Rater NCOER.

AR 623-3 3–43. “Change of Duty” report
a. A code 04, “Change of Duty” evaluation report, is mandatory when a rated Soldier is reassigned to a different principal duty while still serving under the same rater or when he or she is separated from Army service. The reason for submission will reflect the event that warranted the generation of an evaluation report (that is, change of duty, discharge, separation, or retirement). No evaluation report is submitted when organizational changes merely alter the rated Soldier’s principal duty title but do not change the type of work performed (for example, personnel management staff officer to Assistant G–1). A mandatory code 03, “Change of Rater” evaluation report, will be prepared when a change of duty also results in a change of rater (see para 3–40).
b. An evaluation report is mandatory when a rated Soldier is separated from active duty. It is important for raters and senior raters to identify on the final evaluation report any unique skills or talents a rated Soldier possesses on which the Army can capitalize in the future if the Soldier is recalled to active duty service or mobilized in the USAR or ARNG.
c. As an exception, retirement evaluation reports of less than 1 calendar year will be rendered at the option of the rater or senior rater, or when requested by the rated Soldier. Retirement evaluation reports that conclude a Soldier’s military career will have a “THRU” date that is the final day of supervision or last duty day before beginning transition leave or before retiring (if no transition leave will be taken). Rating official minimum time requirements apply.
d. When the rated Soldier is declared missing or becomes a prisoner or hostage, an OER or NCOER is required as of the date of the incident. Under these situations, rating official minimum time requirements do not apply. Evaluation reports will not be rendered on officers for periods during which they are missing, prisoners of war, or hostages. The effect, if any, of a Soldier’s status on other personnel actions, favorable or unfavorable (such as letters of commenda- tion or reprimand), and on actions under UCMJ will be governed by the laws and regulations pertaining to the particular action.

If it's only a detail doesn't the NCO still technically report to his/her assigned unit? Is the unit still responsible for all administrative needs including NCOERs and what not?

The detail unit should provide some notes based on the Solider's performance but again, they would just be supporting bullets to the overall NCOER.