Armed police and checkpoints are removed during the delegation's visit.
Chinese authorities continue to demolish 'illegal' structures, citing crowding and pollution in the scenic area.
He had been jailed in 2014 for producing banned patriotic Tibetan songs.
Authorities say the dwellings and shops are illegal and cause environmental damage.
They had appealed after local officials failed to resolve the dispute.
Samdrub Gyatso is serving time for violating his release terms by traveling outside his home county.
The residents of seven villages in Thangkor town, Sichuan province, have made their pledges at a local monastery.
Arik Dolma Kyab was serving a 10-year jail sentence for ‘endangering national security.’
Their petition over confiscated land has still not been resolved, though.
His protest follows others in September along Ngaba's main street, called 'Heroes' Road' by local residents.
He is suffering from a lung condition he developed as a result of torture in detention.
Though ordered by doctors to rest, his health is 'in general, very good,' he says.
Monks from as many 27 monasteries in Tibetan regions of China are attending the seven-day event, which is being held under tight security.
They had moved back to the area after local officials failed to resolve the dispute.
Authorities make no move to ban or restrict the event, which is attended by Tibetans, Mongolians, and Han Chinese.
She stages her protest despite increased security following a week of similar acts.
Their public calls for Tibetan freedom follow two similar protests in Ngaba earlier in the week.