Question

Scenario:

John and Jane are siblings who jointly inherited a piece of land from their late parents. The land has been registered under their names as co-owners. However, Jane has recently passed away due to an illness. John wants to transfer the ownership of the land solely in his name, but he needs to provide proof of Jane's death to do so.

Question:

1. What are the applicable laws and rules governing the proof of death of a natural person in the Philippines?
2. What specific requirements or documents must John present to prove the death of his sister Jane?
3. Discuss the significance of Civil Code, Article 43 and Rules of Court, Rule 131, section 3 (jj) in the context of proving death.