We would like to remind our community of the importance of following the proposal preparation guidelines of the NSF Proposal & Award Policies & Procedures Guide (PAPPG). While NSF has instituted several automatic compliance checkers in the last few years, there are errors that persist. When errors are identified, all NSF Programs have the option of returning non-compliant proposals without review, however OCE has traditionally tried to be flexible, and allow PIs to correct proposals after submission. We want to share that the level of non-compliance with PAPPG guidelines for OCE proposals has reached 50%, so we need to enlist your help in reducing that number. These compliance errors delay the start of the review process and put additional pressure on our reviewer community. In addition to identified errors resulting in your proposals potentially being returned without review, uncorrected errors in proposals that have gone through the review process can also lead to delays in making awards or, infrequently, in our not being able to recommend a particular proposal for award. The following are examples of issues we currently encounter most frequently: Inclusion of URLs in the Project Description (including Results of Prior Support); Not including distinct subheadings for Intellectual Merit and Broader Impacts in the Project Summary, Project Description, and Results of Prior Support; Not including Results of Prior Support for all project PIs and Co-PIs; Incomplete budget documentation for subawards. These four items are just common examples, and do not cover all the errors that we ask PIs to correct. We also note that new releases of the PAPPG, which are issued every year, often contain new requirements. The PAPPG itself contains a checklist that you may find useful in proposal preparation. We also call your attention to the Division of Ocean Sciences Sample and Data Policy, for guidance in preparing data management plans that conform with OCE Policy. Please note that this policy asks that the disposition of project data and samples should be included in the description of Results of Prior Support, in accordance with the PAPPG.