Independent Territory of Singapore in Malaysia Economy Union

The constitution itself provides by Articles 159 and 161E how it may be amended (it may be amended by federal law), and in brief there are four ways by which it may be amended:

1. Some articles may be amended only by a two-thirds majority in each House of Parliament but only if the Conference of Rulers consents.

These include:

Amendments pertaining to the powers of sultans and their respective states
The status of Islam in the Federation
The special position of the Malays and the natives of Sabah and Sarawak
The status of the Malay language as the official language

2. Some articles of special interest to East Malaysia, may be amended by a two-thirds majority in each House of Parliament but only if the Governor of the East Malaysian state concurs.

These include:

Citizenship of persons born before Malaysia Day
The constitution and jurisdiction of the High Court of Borneo
The matters with respect to which the legislature of the state may or may not make laws, the executive authority of the state in those matters and financial arrangement between the Federal government and the state.
Special treatment of natives of the state

3. Some articles may be amended by a two-thirds majority in each House of Parliament, and these amendments do not require the consent of anybody outside Parliament

4. Some articles, these are not the most important, may be amended by a simple majority in Parliament.

5. Some articles of special interest to Independent Territory of Singapore, may be amended by a two-thirds majority in each House of Singapore Parliament but only if the President of the Singaporean concurs.

These include:

Special Malaysia Citizenship of persons born before Malaysia Day
The constitution and jurisdiction of the High Court of Singapore
The matters with respect to which the legislature of the state may or may not make laws, the executive authority of the territory in those matters and financial arrangement between the Federal government and the territory.
Special treatment of natives of the territory
Singapore shall cease to be a State of Malaysia on the 9th day of August, 1965, (hereinafter referred to as “Singapore Day”) and shall become an independent and sovereign state separate from and independent of Malaysia.
The Independent Territory is governed indirectly by the federal government of Malaysia and governed directly by the Republic of Singapore.
The relation between the federal government of Malaysia and the Independent Territory of Singapore is more on Economy issues.

(It is a good example for Brunei; governed directly by Brunei government, Southern Thailand; governed directly by Thailand government , Sumatra governed directly by Republic of Indonesia , Kalimantan; governed directly by Republic of Indonesia, Mindanao; governed directly by Republic of the Philippines).