Yes, in the United States, the president must sign legislation for it to become law. After Congress passes a bill, it is sent to the president, who can either sign it into law or veto it. If the president vetoes the bill, Congress can still enact it by overriding the veto with a two-thirds majority in both chambers. Alternatively, if the president takes no action for ten days while Congress is in session, the bill automatically becomes law.
If the president passes away, resigns, or is impeached.
The President needs more than one way to pass or veto legislation because it he pockets it congress can't override the veto.
No
A treaty negotiated by the president must be ratified by the United States Senate. Specifically, it requires a two-thirds majority vote in the Senate for the treaty to be formally ratified. Once ratified, the treaty becomes legally binding under international law. The president may also need to implement the treaty through legislation if it requires changes to domestic law.
9 ~apex
In order to become laws, bills must be passed by both houses of Congress. The constitution does not specify that anyone must sign it., but the fact that it passed must be certified in some way. It then must be sent to the president, but he does not need to sign it for it become law, if Congress stays in session for 10 days after he gets it.
If the President dies and the Vice President takes over, the Vice President becomes the President. The Vice Presidency position would then be vacant and would need to be filled according to the constitutional process.
There is no legal requirement to do so, but most of them do.
The bill does not have to be approved by all members of Congress before it can be sent to the President. It also does not need the support or endorsement of any specific political party. Additionally, the bill does not need to go through any particular number of readings or debates in Congress before it can be sent to the President.
It depends on the legislation of the country involved.
The vice president becomes president if the president is incapacitated, so he needs to have all the qualifications of a president, just in case.
'effect' ... the Senate