The phrase "age boundary" is correct and usable in written English.
It can be used to refer to a specific limit or threshold related to age, often in contexts such as legal age restrictions or age-related classifications.
Example: "The age boundary for voting in this country is set at 18 years."
Alternatives: "age limit" or "age threshold".
Wherever the MACR is set, authorities tend to use their discretion with young people close to the age boundary, explains Tim Bateman, a reader in youth justice at the University of Bedfordshire, who is involved with the NAYJ campaign.
If policies aimed at raising the retirement age will be effective, the upper age boundary of 65 should be raised.
I don't imagine that the Germans with an age boundary of 14 are less bothered about the sexual abuse of children than we are.
The differences between the less evolved Nd isotopic compositions of the Narsajuaq arc of Ungava Peninsula and the highly evolved Nd isotopic compositions of the Narsajuaq arc rocks on Baffin Island may explained by: (i) subduction beneath a northward-thickening Archean cratonic block; or (ii) by a relict north south age boundary in the Archean cratonic margin.
Flint axes, arrowheads, and flakes found in the area are attributed to early Bronze Age settlers, and the "Shire Ditch", a late Bronze Age boundary earthwork possibly dating from around 1000 BC, was constructed along part of the crest of the hills near the site of later settlements.
Two samples, which age was estimated by ultrasound as 10w+3d and 11w, near the age boundary of the clusters, were segregated as belonging to the later and earlier stages respectively.
It is art to some and science to others, and knows no age boundaries.
Age boundaries are drawn for mainly political reasons, not scientific ones.
Is their embrace of mainstream pop music a symptom of the same disintegration of age boundaries the Rolling Stones enacted at Glastonbury?
And cooing that she just likes eating children, Kate Duchêne's witch suggests a Mrs. Lovett for the pre-teen brigade: Cannibalism, it seems, knows no age boundaries.
The rash of accident avoidance technologies — like blind spot detection, lane departure warning and adaptive cruise control (which slows your vehicle down if you get too close to another car) — cross age boundaries in their appeal.
