Question: what are the irregular usted commands?
Answer: dar - to give: dé, den.
estar - to be. esté, estén.
haber - to have (auxiliary verb) haya, hayan.
ir - to go. vaya, vayan.
saber - to know. sepa, sepan.
ser - to be. sea, sean. Here is a link to an article about this: Irreg Verbs.