I was thinking about something similar the other day. It seems to me that everyone has pretty much the same morality particular to a time and place, with just small differences, so I'll say Midwest 2017.
Watch "DESIDERATA - You Are A Child Of The Universe - original version" on YouTube
I rely on the decency of good citizenship and being an altruistic humanitarian. To me, being a good person is upholding the civil liberties we enjoy as american citizens. "Do no harm" covers a lot.
I follow the 13 Atheopagan Principles. [atheopaganism.wordpress.com]
Truth
Honor
Justice
Divergent Thinking
Mercy
Enlightenment
Do as thou will harm none but smash your enemies so that they never return...
Generally, I let others lead the way - I always start off by giving everyone the benefit of the doubt (I honestly like everyone from the start). But if I feel they are dishonest, then I am dishonest with them, if they speak ill of others, then I speak ill of them, if others are harmed by their actions (or words), then I have no issue with causing them harm through my actions (or words) - I believe in the adage that what goes around, comes around .. and then I add to it by forcing their behavior back their way. I have many who hate me, I don't care (they started it!)!
A most interesting question. By Moral Code one can be asking a number of questions, but perhaps the clearest is: "What rules govern your behavior?" My training as a psychologist as well as decades of research and observation have me firmly on the side that we are all "ruled governed individuals." I do not think any of us live by a single rule. I could list dozens of rules that govern my own behavior, but perhaps two that are more meaningful to me are: 1) Everything is always as it should be and 2) Everyone is always doing the best they can.
I believe in Karma, The energy you put into the world is what you receive back from it.
Treat others kindly, but that's always been how I self-govern, and I've always been non-religious (with a few detours). And, honestly, simple as kindness is, some times I screw up!
I was raised in an atheist household. I never even knew that religion was supposed to be the source of morality until later in life. My family is extremely ethical. It comes with human nature. It has NOTHING to do with religion. Once I started going through the Bible, I discovered that religion is anything but moral. That's when I started losing respect for people who actually believe in and follow the Bible. My cousin-in-law said that she was brought up in an atheist household that was much less ethical; she realized that atheists were much more ethical, when she joined our family.
I just caught a typo in there. My cousin-in-law was brought up in a religious, not atheist, household that was much less ethical than our atheist family.
I use the laws of the land and the same innate moral code that others use. I use my reasoning to decide and know what is right from wrong. To imply that we need a 'moral code' like a doctrine is to turn us into the sheep of religion.