Visitors and residents should carry photographic ID at all times - a copy of your passport is sufficient. However, your passport must contain a valid visa.

Drinking in the street and anywhere other than a licensed restaurant or bar is not allowed and can lead to arrest.

Photography of or near military official installations is strictly prohibited.  Don’t photograph officials without their consent.  Plane spotting is not advised in any circumstances.  You may be detained or arrested if you use binoculars near an airport.

Women are advised to take extra caution when travelling alone as there have been cases of harassment and sexual assault, including rape. Egyptian family law is very different from UK law and particular caution is needed when, for example, child custody becomes an issue.

When it came to laws, many of them involved punishments to fit crimes. In a religious country, right and wrong were most likely clearly defined, and doing 'wrong' was not just a general bad idea, but it brought disgrace on one's entire family. Punishments for wrong doing were as lax as caning or as severe as dismemberment or various executions

A good number of the people carrying out the Pharaoh's decrees where priests and holy men. This group formed their own social class as they were given preferential treatment before other citizens and were a kind of nobility in their own right. 

It is thought that the laws of ancient Egypt were at least partially codified.  In fact, we learn from one Greek writer that in the Late Period there were probably eight books that set out the legal code. 

The Greek lawgiver Solon visited Egypt in the 6th century BC, studied their law and adapted many aspects of it into the legal system of Athens.

Essentially, we believe that Egyptian law was based on a common sense view of right and wrong, following the codes based on the concept of Ma‘at. Ma'at represented truth, order, balance and justice in the universe. 

http://www.fco.gov.uk/en/travel-and-living-abroad/travel-advice-by-country/middle-east-north-africa/egypt

http://www.digitalegypt.ucl.ac.uk/administration/law.html