The phrase "an additional contingent" is correct and usable in written English.
It can be used when referring to an extra group or condition that is dependent on something else, often in contexts like contracts, agreements, or planning.
Example: "The project will proceed as planned, but we must consider an additional contingent that may affect our timeline."
Alternatives: "an extra condition" or "a supplementary group".
A Council diplomat said Monday that an additional contingent of Bangladeshi troops was expected to reinforce them.
But why has Trump so captivated the imaginations – and hearts – not only of this new stripe of conservative voters but also of an additional contingent of formerly apathetic white, working-class citizens?
He conferred briefly with the musicians, grinning and joking, looking out at the room, where the audience of twenty had now grown to twenty-five, with an additional contingent of bellhops and valet parkers standing against the back wall.
Hewlett-Packard agreed to pay the investment banking division $1 million before the vote and an additional $1 million, contingent on the approval and completion of the merger.
However, subjects were told prior to the task that they could win up to an additional $25 contingent on their performance and that no debt would be accrued (i.e., subjects could not owe money).
Cubist said it would pay Optimer shareholders $10.75 a share in cash upfront, and an additional $5 a share contingent on Optimer's meeting certain sales milestones.
Dubai World's liabilities of $24.9 billion have risen from the $23.5 billion announced in May and include accrued interest and additional contingent claims, the government said.
The IMF said Greek debt would peak at around 176% of GDP in 2013, and decline to 124% in 2020, "after additional contingent relief measures of about 4% of GDP from Greece's European partners to be determined in 2014/15".
Throughout the month of June, additional contingents of church-dressed Mormons walked in Pride Parades in Boise, Portland, Seattle, Minneapolis, Chicago, Cleveland, Houston, Washington, D.C, San Francisco and New York City, bearing signs that read "God loves all His children;" "I support marriage equality... and I'm a Mormon;" "Gay kids grow up Mormon; I'm here to keep them safe".
The purchase included an upfront payment of $980 million and an additional $1.2 billion largely contingent on Nicholas-Applegate meeting growth and performance targets over the next five years.
A fourth step, checking students' learning, is suggested as an additional step in contingent teaching.
