The word "vow" is correct and usable in written English.
You can use it when referring to a solemn promise made to another person, such as marriage vows. For example, "After they shared their wedding vows, the newlyweds sealed their love with a passionate kiss."
This course of action may have future implications for the union itself, but that is the territory Labour accepted when it signed the vow.
"The conduct displayed by these individuals was appalling, deeply troubling, and did not meet the high standards that all of our sworn police officers vow to uphold," the statement said.
So the Financial Times's splash is headlined Cameron builds on Right to Buy in effort to regain the edge from Miliband and its leading article, unimpressed with Labour's financial pledges, is headlined Miliband's belated vow to do his fiscal homework.
Yvette Cooper will on Tuesday also promise to back government plans to cut corporation tax and vow that she will set up a prominent business advisory group that will advise her as party leader.
They voice concerns that should she win the presidency with progressive support, Clinton would fail to implement a progressive agenda – analogous to how Barack Obama campaigned, twice, on a vow to close the prison at Guantánamo Bay, but has not.
Just before the Scottish referendum, panicked by a YouGov poll suggesting that the yes campaign was ahead, the main UK party leaders made a "vow" via the front page of the Daily Record.
Guides now vow to "be true to myself and develop my beliefs" and "to serve my Queen and community".
The coalition took office more than four years ago with a vow to rebalance the UK economy towards exports and manufacturing and away from its dependence on domestic spending.
If for instance the Parades Commission imposed another vow of silence as bands passed by St Patrick's, will the PSNI execute that ruling on the streets?
A gay couple have no obligation to make that vow because they do not have to forsake all others because they cannot divorce for adultery – there is no requirement for faithfulness.
Ahead of Tuesday's election, some Palestinian officials close to Abbas had intimated that a Netanyahu victory – not least in terms of his outright rejection of a two-state solution and his vow to continue settlement construction – would mark a clear break in a US-led peace process that has been on ice since it collapsed almost a year ago.
