An ICTBlockState object represents a block's current state.

It might be required for you to import the package if you encounter any issues, so better be safe than sorry and add the import.
import mods.contenttweaker.BlockState;

You can get an ICTBlockState either as a parameter in an IBlockAction function or from the Block Bracket Handler

<block:minecraft:dirt>

ZenMethod	ZenGetter	Rückgabetyp	Beschreibung
ZenMethod getBlock()	ZenGetter block	Rückgabetyp IBlock	Beschreibung Returns the refered block
ZenMethod getMeta()	ZenGetter meta	Rückgabetyp int	Beschreibung Returns the refered block's metadata
ZenMethod canProvidePower()	ZenGetter ​	Rückgabetyp boolean	Beschreibung Returns if the refered block can provide Redstone Power
ZenMethod getMobilityFlag()	ZenGetter ​	Rückgabetyp PushReaction	Beschreibung Returns the push reaction flag

boolean isReplaceable(IWorld world, IBlockPos pos);
Parameters:

• IWorld world → The world to be checked in
• IBlockPos pos → The Block's position

Returns a boolean that sais whether the block can be replaced or not.

int getLightValue(IWorld world, IBlockPos blockPos);
Parameters:

• IWorld world → The world to be checked in
• IBlockPos pos → The Block's position

Returns an int representing the current light value at the given location.

int getWeakPower(IWorld world, IBlockPos blockPos, Facing facing);
Parameters:

• IWorld world → The world to be checked in
• IBlockPos pos → The Block's position
• Facing facing → The side to be checked

Returns an int representing the current redstone power on this side.

int getComparatorInputOverride(IWorld world, IBlockPos blockPos);

Parameters:

• IWorld world → The world to be checked in
• IBlockPos pos → The Block's position

Returns an int representing the block's redstone comparator input override type.

You can either use int compare(ICTBlockState other); or the ZenCompare Tokens == !=.
The return different types though:

• state.compare(other) returns an int that is 0 if they are equal
• state == other returns a bool that is true of they are equal