ILO Convention No. 89 - ILO Convention No. 89

…(See the sections on Child Labor and Minor Labor and Female Labor). ILO Convention No. 89 defines nighttime as a continuous 11-hour period, including the seven consecutive hours between 10 p.m. and 7 a.m., and prohibits women from working in principle (Convention No. 90 broadens the definition of nighttime and prohibits minors from working at night). Unlike the day-night reversal in a laboratory or the jet lag experienced by East-West travelers, continuous nighttime work does not completely reverse the circadian rhythm of functional changes that occur in the body on a roughly daily cycle. …

*Some of the terms mentioned in "ILO Convention No. 89" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…(〈児童労働･年少労働〉および〈女子労働〉の項参照)。ILO89号条約では，午後10時～午前7時の間の継続した7時間を含む継続した11時間を深夜として，女子の就業を原則的に禁止している(90号条約では夜間の定義をより広げたうえで年少者の夜間労働を禁止)。　深夜業の継続は，実験室内の昼夜逆転や東西旅行者の時差ぼけと違って，生体内のほぼ1日を周期とする機能変動circadian rhythmを完全には逆転させない。…

※「ILO89号条約」について言及している用語解説の一部を掲載しています。

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