Is it appropriate to wear an honor stole/cord to my doctoral hooding and convocation? I didn't have the chance to wear my academic stole or honor cord during my undergraduate graduation.

Question:  Would it be appropriate to wear the academic stole and honor cord to my doctoral hooding and convocation?

EDIT I should mention that at least one of the items was earned during my graduate career, if that has any bearing.

I can't find any guidance from my university.
Formal regalia for convocations are highly stylised - even the side to which a tassel falls can have meaning. It would not normally be appropriate to wear representations of achievement that are unrelated to the degree you are about to receive.

If the honor stole/cord has particular significance to you, you can write to your university to explain your situation and to ask for permission to wear it at your convocation. You should then abide by their reply.