The House of Representatives on Wednesday passed a marriage equality bill in a landmark step that moves the country closer to becoming the third in Asia to legalise same-sex unions.

The bill requires approval from the Senate and royal endorsement before it becomes law, which is expected later this year.

An MP said the bill would give same-sex couples the same legal rights and benefits as those of husbands and wives.

Those would include government-supported medical treatment, tax deductions, the rights to approve the medical treatment of spouses, manage and inherit the assets of spouses, adopt children and organise the funerals of spouses.

The passing of the bill marks a significant step towards cementing Thailand’s position as one of Asia’s most liberal societies on lesbian, gay, bisexual and transgender issues, with openness coexisting with traditional, conservative Buddhist values.

Thailand has long been a draw for same-sex couples, with a vibrant LGBT social scene for locals and expatriates, and targeted campaigns to attract LGBT travellers.

The bill could take effect within 120 days of royal approval. Thailand would follow Taiwan and Nepal in becoming the first places in Asia to legalise same-sex unions.