47 (b) The sessions that are adjourned due to invalidity in accord with the Sub-Section (a) as well as the valid sessions that are extended will be valid if at least one-third of the Hluttaw representatives are present. 129. (a) A matter that shall be resolved in the Pyithu Hluttaw, save as otherwise provided by the Constitution, shall be determined by a majority of votes of the Pyithu Hluttaw representatives who are present and voting. (b) The Speaker of the Pyithu Hluttaw or the Deputy Speaker discharging duties as the Speaker at the Pyithu Hluttaw shall not vote in the first instance in the sessions of the Pyithu Hluttaw, but shall have and exercise a casting vote in the matter of an equality of votes. 130. (a) If a Pyithu Hluttaw representative is, without permission of the Pyithu Hluttaw, absent from a Pyithu Hluttaw session for a period of at least 15 consecutive days, the Pyithu Hluttaw may declare his seat vacant. In computing the said period of 15 days, no account shall be taken of any period during which the session is adjourned. (b) If the Speaker of the Pyidaungsu Hluttaw informed the Pyithu Hluttaw that a Pyithu Hluttaw representative is absent from a Pyidaungsu Hluttaw session for a period of 15 consecutive days without permission, the Pyithu Hluttaw shall take action against the said representative in accord with the prescribed procedures.