diff --git a/src/cmd/sign.js b/src/cmd/sign.js
index 25c20b96c3..1e1108f26e 100644
--- a/src/cmd/sign.js
+++ b/src/cmd/sign.js
@@ -33,6 +33,7 @@ export default function sign(
     channel,
     amoMetadata,
     uploadSourceCode,
+    onlyHumanReadableSourceCode,
     webextVersion,
   },
   {
@@ -43,6 +44,20 @@ export default function sign(
   } = {},
 ) {
   return withTempDir(async function (tmpDir) {
+    if (!uploadSourceCode && !onlyHumanReadableSourceCode) {
+      throw new UsageError(
+        'Incomplete command. Either --upload-source-code or --only-human-readable-source-code ' +
+        'CLI options should be explicitly included in the sign command.'
+      );
+    }
+
+    if (uploadSourceCode && onlyHumanReadableSourceCode) {
+      throw new UsageError(
+        'Invalid options. Only one of --upload-source-code or --only-human-readable-source-code ' +
+        'CLI options should be included in the sign command.'
+      );
+    }
+
     await prepareArtifactsDir(artifactsDir);
 
     let manifestData;
diff --git a/src/program.js b/src/program.js
index 35d794a912..a5dbb9a3a2 100644
--- a/src/program.js
+++ b/src/program.js
@@ -582,10 +582,22 @@ Example: $0 --help run.
           describe:
             'Path to an archive file containing human readable source code of this submission, ' +
             'if the code in --source-dir has been processed to make it unreadable. ' +
+            'Use --only-human-readable-source-code option if source code assets ' +
+            'in the submission are all human readable.' +
             'See https://extensionworkshop.com/documentation/publish/source-code-submission/ for ' +
-            'details. Only used with `use-submission-api`',
+            'details.',
           type: 'string',
         },
+        'only-human-readable-source-code': {
+          describe:
+            'Signal that all source code assets in the xpi file are already human readable ' +
+            'and uploading a separate source code archive is not necessary.' +
+            'See https://extensionworkshop.com/documentation/publish/source-code-submission/ for ' +
+            'details.',
+          type: 'boolean',
+          demandOption: false,
+          default: null,
+        },
       },
     )
     .command('run', 'Run the extension', commands.run, {
diff --git a/tests/functional/test.cli.sign.js b/tests/functional/test.cli.sign.js
index 6db035e984..5eada29d5c 100644
--- a/tests/functional/test.cli.sign.js
+++ b/tests/functional/test.cli.sign.js
@@ -60,6 +60,7 @@ describe('web-ext sign', () => {
         '--verbose',
         '--channel',
         'listed',
+        '--only-human-readable-source-code',
         '--amo-base-url',
         'http://localhost:8989/fake/api/v5',
         '--api-key',
@@ -97,6 +98,7 @@ describe('web-ext sign', () => {
             sign: {
               amoBaseUrl: 'http://localhost:8989/fake/api/v5',
               channel: 'listed',
+              onlyHumanReadableSourceCode: true,
             },
             sourceDir: srcDir,
           },
diff --git a/tests/unit/test-cmd/test.sign.js b/tests/unit/test-cmd/test.sign.js
index 372d6593d0..1b2ad854ab 100644
--- a/tests/unit/test-cmd/test.sign.js
+++ b/tests/unit/test-cmd/test.sign.js
@@ -57,15 +57,22 @@ describe('sign', () => {
    * Run the sign command with stubs for all dependencies.
    */
   function sign(tmpDir, stubs, { extraArgs = {}, extraOptions = {} } = {}) {
+    const signCLIOptions = {
+      verbose: false,
+      artifactsDir: path.join(tmpDir.path(), 'artifacts-dir'),
+      sourceDir: tmpDir.path(),
+      channel: 'listed',
+      ...stubs.signingConfig,
+      ...extraArgs,
+    };
+    if (
+      !('uploadSourceCode' in signCLIOptions) &&
+      !('onlyHumanReadableSourceCode' in signCLIOptions)
+    ) {
+      signCLIOptions.onlyHumanReadableSourceCode = true;
+    }
     return completeSignCommand(
-      {
-        verbose: false,
-        artifactsDir: path.join(tmpDir.path(), 'artifacts-dir'),
-        sourceDir: tmpDir.path(),
-        channel: 'listed',
-        ...stubs.signingConfig,
-        ...extraArgs,
-      },
+      signCLIOptions,
       {
         ...stubs.signingOptions,
         ...extraOptions,
@@ -89,6 +96,7 @@ describe('sign', () => {
                 sourceDir,
                 artifactsDir: path.join(tmpDir.path(), 'artifacts'),
                 channel: 'listed',
+                onlyHumanReadableSourceCode: true,
                 ...stubs.signingConfig,
                 apiProxy,
               },
@@ -223,6 +231,21 @@ describe('sign', () => {
       });
     }));
 
+  it('rejects an UsageError if --upload-source-code or --only-human-readable-source-code are both falsey', async () => {
+    const signPromise = completeSignCommand({});
+    await assert.isRejected(signPromise, UsageError);
+    await assert.isRejected(signPromise, /Incomplete command. Either .* CLI options should be explicitly included/);
+  });
+
+  it('rejects an UsageError if --upload-source-code and --only-human-readable-source-code are both truthy', async () => {
+    const signPromise = completeSignCommand({
+      uploadSourceCode: 'fake-source-code-path.zip',
+      onlyHumanReadableSourceCode: true,
+    });
+    await assert.isRejected(signPromise, UsageError);
+    await assert.isRejected(signPromise, /Invalid options. Only one of .* CLI options should be included/);
+  });
+
   it('passes the uploadSourceCode parameter to submissionAPI signer as submissionSource', () =>
     withTempDir((tmpDir) => {
       const stubs = getStubs();