The current Dalai Lama, while still very active, recently turned 81 but is yet to make a decision about his successor.
"As far as the next Dalai Lama is concerned it's already on the table and he can come through reincarnation, selection or emanation. These options are on the table but not yet executed," he said, while speaking at the 'Indo-Tibet Summit' organised by the South and East Asia Foundation here.
In reincarnation, one has to die and reborn. Selection is when the high lamas meet and select the Dalai Lama and emanation is when the Dalai Lama designates his own successor before he passes away.
Sangay said that as per the procedure, selection of the next Dalai Lama by China would be "illegitimate".
More From This Section
"The communist party says religion is poison. They don't believe in religion. They destroy monasteries, disrobe monks and nuns. What is the basis of legitimacy they will have to select the next Dalai Lama? Not at all," he said.
Last month, China's official think-tanks had announced that the next highest monk of Tibetan Buddhism must have the endorsement of Beijing. China has held the same positions for years now.
The Dalai Lamas have historically enjoyed considerable political and spiritual influence over Tibetans.
China is keen to pick up the successor to the current Dalai Lama to firm up its hold over Tibet, which it has kept under tight political, military and administrative control after it took over the area in 1951.
"There are practical reasons because China says 'One China' cannot be negotiated. That's a reality. And we say, Ok, if that is non-negotiable then what is negotiable is genuine autonomy, which is written in the Chinese constitution and which should be given to Tibetan people," the president said.
Sangay also expressed gratitude towards India for all the support shown by it towards the Tibetan cause over the years.
"India and Indian government has done the most work for Tibetan people. But recently, what has happened is that what was happening in closed doors is now being done out in the open," he said.