While the law does not mandate a company to amend its M&AA to cater to one director company, you may wish to examine your own M&AA to determine if it contains any provisions that will not be operatable if the number of directors is reduced to 1. Every company can draft its own set of M&AA and need not rely solely on the provisions in Table A of the Companies Act. In this regard, please refer to section 4 and 184 of the Companies Act.
If the company has been set up with only one director, then section 4(11) of the Companies Act is applicable, so that a requirement under the Act which is imposed on 2 directors will be satisfied by the act of the single director of the company. However, if the company has 2 directors, then the report under section 201(5) has to be signed by 2 directors, though in limited circumstances ACRA may, upon application by the sole director, accept a report signed by one director (where, for example, the other director cannot be found within Singapore).