If a person reaches age 62 in 2015, for example, then 2015 is the person's year of eligibility. We always index an individual's earnings to the average wage level two years prior to the year of first eligibility.
rill - a small channel (as one formed by soil erosion) channel - a deep and relatively narrow body of water (as in a river or a harbor or a strait linking two larger bodies) that allows the best passage for vessels; the ship went aground in the channel.
In urban planning, infill is the rededication of land in an urban environment, usually open-space, to new construction.[1] Infill also applies within an urban polity to construction on any undeveloped land that is not on the urban margin. The slightly broader term land-recycling is sometimes used instead. Infill has been promoted as an economical use of existing infrastructure and a remedy for urban sprawl.