From e4f8ff9aa086794fa1c8ebaef84339714aabb0f8 Mon Sep 17 00:00:00 2001
From: Owen Farrell <owen.farrell@gmail.com>
Date: Tue, 9 Jun 2020 10:34:09 -0400
Subject: [PATCH] Updated README

Signed-off-by: Owen Farrell <owen.farrell@gmail.com>
---
 README.md | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index b0353b5..0714c48 100644
--- a/README.md
+++ b/README.md
@@ -9,8 +9,8 @@ level of precision is better left to other tools.
 
 ## Source Configuration
 
-* `interval`: *Optional.* The interval on which to report new versions. Valid
-  values: `60s`, `90m`, `1h`.
+* `interval`: *Optional. Required unless `start` and `stop` are defined.* The
+  interval on which to report new versions. Valid examples: `60s`, `90m`, `1h`.
 
 * `location`: *Optional. Default `UTC`.* The
   [location](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones) in
@@ -24,7 +24,8 @@ level of precision is better left to other tools.
 
 * `start` and `stop`: *Optional.* Only create new time versions between this
   time range. The supported formats for the times are: `3:04 PM`, `3PM`, `3
-  PM`, `15:04`, and `1504`.
+  PM`, `15:04`, and `1504`. If a `start` is specified, a `stop` must also be
+  specified, and vice versa.
 
   e.g.