Mr Lim joined the Party back in 1959, when Singapore's inaugural Chief Minister David Marshall was still its Secretary-General.
He succumbed to his injuries at around 10pm on 28 May.
Officers from Chaing Mai Zoo and a national park in the province are still searching for the kangaroo.
It is unknown whether the victim was a passenger or a crew member.
One of his legs was amputated while the other was fractured.
Three people were taken to two separate hospitals.
The hornbill population has recovered with the help of local conservation efforts.
Mdm Tan's remains were exhumed in 2003.
The teen also credited his mum for his achievement.
He may face up to seven years in jail, a potential fine of up to S$50,000, or both.