Twenty-second Amendment to the United States Constitution
As worded, the primary focus of the 22nd Amendment is on limiting individuals twice elected to the presidency from being elected again. Due to this, several issues could be raised regarding the amendment's meaning and application, especially in relation to the 12th Amendment, ratified in 1804, which states, "But no person constitutionally ineligible to the office of President shall be eligible to that of Vice-President of the United States". While it is clear that under the 12th Amendment the original constitutional qualifications of age, citizenship, and residency apply to both the president and vice president, it is unclear whether someone who is ineligible to be elected president could be elected vice president. Because of this apparent ambiguity, there may be a loophole in the 22nd Amendment whereby a two-term former-president could be elected vice president and then succeed to the presidency as a result of the incumbent's death, resignation, or removal from office (or even succeed to the presidency from some other stated office in the presidential line of succession).
President of the Philippines
Article 7, Section 2 of the Constitution reads:
"No person may be elected President unless he is a natural-born citizen of the Philippines, a registered voter, able to read and write, at least forty years of age on the day of the election, and a resident of the Philippines for at least ten years immediately preceding such election." 
The Constitution also provides term limits where the President is ineligible for reelection and a person who has succeeded as President and has served as such for more than four years will be ineligible to be elected for a second term. However, with the case of Joseph Estrada who was elected president in 1998, deposed in 2001, and again ran for the presidency in 2010, the Constitution's wording where "[the] President shall not be eligible for any re-election" remains unclear as his case was never brought to the Supreme Court. It remains unclear whether the term limit of no re-election applies only to the incumbent President or for any person who has been elected as President.