The problem is, whatever the law may say, most employers worry that there will be instability if the workers are forewarned. As a result, they would rather procrastinate until the last possible moment before announcing the closing; anyway, they figure, they can compensate for not meeting the required number of days by paying more money.
只是，不管法律規定如何，總有雇主怕宣佈後「夜長夢多」、不得安寧，而寧願拖到紙包不住火了才宣佈；反正預告不足的天數，可以用錢補足。