Jeff, Steve's comment is very important and useful. If you are not working in harmony, you both loose this company. I understand that you both contribute and do vital activities to your start-up. I was and still am in a similar situation.
When you signed your business agreement did you both invested cash? Was it the same amount or relative to your shares? Cash is considered more important than work and time spent.
Slicing Pie, Funding Your Business Without Funds by Michael D. Moyer is a good source to learn from. You can also get Mike's advice through his blog, or by his book at Amazon.
I am sure that there is no rule to follow. However if you do not convince your partner to happily continue spending his full time in your business, you will loose him.
I followed Mike's advice when my co-founder could no more be involved full time and left for an job with immediate income. he is still with us, but we agreed he forwarded me part of his shares. After his leave no more co-founders were willing to invest, and I accepted them with full co-founder rights, but they get equity based on success. So we are now 6 people working part time, while I am the only one investing cash and contribute full time (24/7). We have a new founders agreement and Company Regulations. We decide each in his formal position and we vote at Shareholders meetings according to our shares.
Decisions are done by founders related to their position (CEO, CFO, CTO, and COO) and main decisions like dilution or investments are decided by Shareholders Meetings. Less critical decisions by our Board of Directors.
Yes, I must agree that except the technical part (I am a physicist and computer expert) most of my energy goes to organization, layers, advises and presenting the company to prospective investors.
Convincing investors to spend serious amount of cash is crucial and your company probably cannot survive to GoToMarket stage without them.