diff --git a/dev/TEAL.md b/dev/TEAL.md
index e25ac4d..4b62396 100644
--- a/dev/TEAL.md
+++ b/dev/TEAL.md
@@ -148,14 +148,18 @@ of a contract account.
   transaction against the contract account is for the program to
   approve it.
 
-The bytecode plus the length of all Args must add up to no more than
-1000 bytes (consensus parameter LogicSigMaxSize). Each opcode has an
-associated cost, usually 1, but a few slow operations have higher
-costs. Prior to v4, the program's cost was estimated as the static sum
-of all the opcode costs in the program (whether they were actually
-executed or not). Beginning with v4, the program's cost is tracked
-dynamically, while being evaluated. If the program exceeds its budget,
-it fails.
+The size of a Smart Signature is defined as the length of its bytecode
+plus the length of all its Args. The sum of the sizes of all Smart
+Signatures in a group must not exceed 1000 bytes times the number of
+transactions in the group (1000 bytes is defined in consensus parameter
+`LogicSigMaxSize`).
+
+Each opcode has an associated cost, usually 1, but a few slow operations
+have higher costs. Prior to v4, the program's cost was estimated as the
+static sum of all the opcode costs in the program (whether they were
+actually executed or not). Beginning with v4, the program's cost is
+tracked dynamically, while being evaluated. If the program exceeds its
+budget, it fails.
 
 The total program cost of all Smart Signatures in a group must not
 exceed 20,000 (consensus parameter LogicSigMaxCost) times the number
diff --git a/dev/ledger.md b/dev/ledger.md
index 151d6b9..a867f9c 100644
--- a/dev/ledger.md
+++ b/dev/ledger.md
@@ -490,7 +490,7 @@ which can be encoded as a msgpack struct:
  - The number of digits after the decimal place to be used when displaying the
    asset, encoded with msgpack field `dc`.  A value of 0 represents an asset
    that is not divisible, while a value of 1 represents an asset divisible into
-   into tenths, 2 into hundredths, and so on.  This value must be between 0 and
+   into tenths, 2 into hundredths, and so on.  This value must be between 0 
    and 19 (inclusive) ($2^{64}-1$ is 20 decimal digits).
 
  - Whether holdings of that asset are frozen by default, a boolean flag encoded
@@ -638,9 +638,9 @@ specific fashion:
   In more detail, let $r$ be the last round in which a transaction touched account $I$ (and therefore all pending rewards were added to it). Consider the following quantities, as defined in the [Account State](#account-state):
   
   - The raw balance $a_I$  of account $I$ at round $r$ is its total balance on that round.
-  - The rewards base $a'_I$ is meant to capture the total rewards that were allocated to all accounts upto round $r$, expressed as a fraction of the total stake (with limited precision as described below).
+  - The rewards base $a'_I$ is meant to capture the total rewards that were allocated to all accounts up to round $r$, expressed as a fraction of the total stake (with limited precision as described below).
 
-  Given these two quantities, the normalized balance of an online account $I$ is $a_I/(1+a'_I)$. For example, if the total amount of rewards distributed upto round $r$ is 20% of the total stake, then the normalized balance is $a_I/1.2$.
+  Given these two quantities, the normalized balance of an online account $I$ is $a_I/(1+a'_I)$. For example, if the total amount of rewards distributed up to round $r$ is 20% of the total stake, then the normalized balance is $a_I/1.2$.
 
   To limit the required precision in this calculation, the system uses a parameter $ru$ that specifies the rewards-earning unit, namely accounts only earn rewards for a whole number of $ru$ microAlgos. (Currently $ru=1,000,000$, so the rewards-earning unit is one Algo.)
 
@@ -1155,7 +1155,7 @@ If the sum of the fees paid by the transactions in a transaction group is less t
 
 If the sum of the lengths of the boxes denoted by the box references in a
 transaction group exceeds 1,024 times the total number of box
-referencess in the transaction group, then the block is invalid. Call
+references in the transaction group, then the block is invalid. Call
 this limit the _I/O Budget_ for the group. Box references with an
 empty name are counted toward the total number of references, but add
 nothing to the sum of lengths.
@@ -1165,7 +1165,11 @@ modification) in a transaction group exceeds the I/O Budget of the
 group at any time during evaluation (see [ApplicationCall Transaction
 Semantics]), then the block is invalid.
 
-Beyond the TxGroup, MinFee, and Box size checks, each transaction in a
+If the sum of the lengths of all the logic signatures and their arguments
+in a transaction group exceeds the number of transactions in the group times
+1000 bytes (consensus variable `MaxLogicSigSize`), then the block in invalid.
+
+Beyond the TxGroup, MinFee, Box size, and LogicSig size checks, each transaction in a
 group is evaluated separately and must be valid on its own, as
 described below in the [Validity and State Changes] section. For
 example, an account with balance 50 could not spend 100 in transaction