"The book, "The Method of Deity Worship for the International Society for Krishna Consciousness," is approved by the GBC Body. All devotees engaged in
Deity worship in ISKCON temples with installed Deities should study and take guidance from this book."
HH Radha Govind Maharaj mentions this incident on his flight from Kenya to India his flight had a transit via Kuwait. Due to some delay he had to wait for 4-5 hrs at Kuwait. While chanting Hare Krishna in the airport lounge, 1 airport official watching the Indian swami became intrigued and called himover to speak.
At first Maharaj was feeling somewhat reluctant to go as he was in a country which may not appreciate his path. Gathering courage with faith in his Lord, Maharaj went to meet the man.
2nd initiates only to worship temple deities and cook in temple kitchens.
Srila Prabhupada's letter to: Yamuna -- Los Angeles 2 March, 1970 : 70-03-02 :
Regarding an assistant Pujari, Ilavati may be trained to assist you, but she may not conduct Arcana without being dvija. The system is that only one who is qualified with Gayatri initiation may directly worship the Deities (i.e. bathing, offering bhoga and aratrik, cooking for the Deities, etc.). But she may assist you by helping in all other respects. If for some reason you are unable to perform aratrik, there are other devotees, initiated brahmanas, who can make the offerings there.