How do you format an executive summary?
Answer
From The Purdue Online Writing Lab: Abstracts and Executive Summaries - Purdue OWL® - Purdue University and Report Writing - Purdue OWL® - Purdue University (They consider an Executive Summary to be "Report Writing.")
"How to Write an Executive Summary" from the JFK School of Government at Harvard: how_to_write_an_exex_summ_to_use_4_18_18.pdf (harvard.edu)