Indonesia's parliament ratified on Thursday (Dec 15) a sea border agreement between the country and Singapore, Indonesia media reported.

The House of Representatives passed a Bill on the landmark treaty signed in 2014 by Indonesia and Singapore demarcating the sea borders in the eastern part of the Strait of Singapore, in the area between Changi and Batam, reported Jakarta Globe.

Covering a border stretching 9.45km, the agreement clearly indicates areas belonging to the two sides - critical for upholding sovereignty and enforcing the law.

The treaty is the third of its kind, after two previous ones inked in 1973 and 2009. Together the three pacts account for 67.3km in the Singapore Strait.

House deputy speaker Fahri Hamzah officiated the passage of the Bill on Thursday after a majority of lawmakers signalled their approval, the Jakarta Globe said.

In a statement on Thursday night, a Foreign Affairs Ministry spokesman said: "Singapore welcomes the news that the Indonesian House of Representatives has ratified the Treaty by acclamation. The Treaty underscores our excellent working relationship and bilateral ties, and demonstrates the ability of both countries to work together in areas of mutual interest.

"Singapore is prepared to exchange the instruments of ratification once Indonesia is ready to do so."