TASK DEFINITION: In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.
PROBLEM: An oral law is a code of conduct in use in a given culture , religion or community application , by which a body of rules of human behaviour is transmitted by oral tradition and effectively respected , or the single rule that is orally transmitted .

SOLUTION: An oral law are rules of human behavior in use in a given culture , religion or other group , which is transmitted by oral tradition and respected .

PROBLEM: The atomic radius of a chemical element is a measure of the size of its atoms , usually the mean or typical distance from the center of the nucleus to the boundary of the surrounding shells of electrons .

SOLUTION: The atomic radius of an element is the distance between the nucleus and the edge of the electron cloud .

PROBLEM: The registration identifier is a numeric or alphanumeric ID that uniquely identifies the vehicle or vehicle owner within the issuing region 's vehicle register .

SOLUTION:
There is a numeric or alphanumeric code that identifies the vehicle .