Q1:Will the lay Stream-winner eat after midday?
This question is based on :
Verse 11: Scrupulous Integrity
Another special quality of a Stream-winner is transparent honesty and scrupulous integrity. Although they are not yet free from greed, hatred, and delusion, Stream-winners are completely free from immorality. A monk who is a Stream-winner may sometimes fall into offences due to heedlessness, but when reminded that such an action is an offence against a training rule laid down by the Buddha, or realising this by himself on reflection, he does not conceal it, but makes amends in the prescribed way. One who wishes to attain Stream-winning should be equally scrupulous, seeing fear in the slightest fault.
For example: to eat after midday is an offence for a bhikkhu. Each mouthful taken is an offence to be confessed (pācittiya). If he thinks it is before midday when it is not, it is still an offence. If it is before midday, but he thinks it is after midday, or he is doubtful, it is an offence of wrong-doing (dukkata). A Stream-winner would not take a single morsel of food if he thought it was after midday, as to do so would be shameless. Due to unmindfulness he might do so, but afterwards he would confess his offence. Stream-winners have a keen desire to follow the training rules and readily confess their offences if they do fall into any — they are not disobedient. http://www.aimwell.org/Books/Pesala/Ratana/ratana.html