1. Zoroastrian religion has many ceremonies and rituals, the shortest among which is the Kasti ritual and the longest existing ritual is the Nirang-din ritual. The basic rules and regulations for all the rituals is the same, which is to maintain sanctity and ritual purity in and around the ritual at all costs.
2. The presence of non-Zoroastrians in close proximity to the ritual very largely enhances the possibility of hampering the stringent rules and regulations of ritual purity required for the spiritual success of a ritual. That is why the Zoroastrians have the tradition of not performing even the Kasti ritual in close proximity and presence of non- Zoroastrians.
3. Even a Zoroastrian who is not in a state of physical purity and ritual-purity cannot attend or be near a place where any Zoroastrian ceremony or ritual is performed. The reason is the same, that in the presence of such persons, there is a possibility of disturbing the conditions for the successful performance of a ritual.
4. In the last few decades, a misconception has been going round in the community that non- Zoroastrians can attend a Khushali nu Jashan, that is, a Jashan on a happy occasion. This is, as it were, a misconception, because a Jashan is a Jashan, whether it is for a happy or solemn occasion. If at all, due to certain circumstances, the presence of non-Zoroastrians become inevitable, they have to be requested to maintain a considerable distance from the performance.