Sounds like he is full of it to me. You should have just told him to go away as an irrelevance.
Rather sadly I have looked at dress Regs and;
AP1358, CHAP 1
Temporary/National Emblems
0132. No unauthorised ornament or emblem is to be worn with uniform. The following exceptions are permitted, provided the wearer is not on
parade:
a. The national flower or emblem on St George’s, St Andrew’s, St David’s and St Patrick’s Day, according to nationality.
b. Remembrance Day Poppy. The poppy may be worn from the onset of sales. Poppies are to be removed after the National and local
observation of remembrance has concluded each year.
c. Flags and emblems on the authorised day.
That is all that is said in the official RAF dress regs, so I am happy that he has made up his rather starange leaf positioning twaddle.
**Open source for the Dress Regs**