• The Act came into force [ or became effective ( or valid )] January 1, 1959.
• At even higher fields a second limiting mechanism sets in ( or comes into play ), causing a complete saturation of velocity.
• The Act came into force [ or became effective ( or valid )] January 1, 1959.
• At even higher fields a second limiting mechanism sets in ( or comes into play ), causing a complete saturation of velocity.
Циммерман М., Веденеева К.. Русско-Английский научно-технический словарь переводчика. Russian-English scientific dictionary for translators. 2012